It's amazing how much of the content included in The Legend of Zelda: Breath of the Wild is entirely optional and can easily be missed on your first playthrough if you're not exploring off the beaten track.
One of the coolest optional features involves the construction of an entire town, and it's also one of the longest quests in the game, requiring you to harvest resources and recruit townsfolk from all over Hyrule.
Zelda: Breath of the Wild Tarrey Town Guide: Getting Started
To start the Tarrey Town quest you first have to save a house in Hateno Village from demolition at the hands of the Bolson Construction Company. You can find the house right next to the Myahm Agana Shrine, across a small bridge just behind some new homes that have been erected by the construction company.
Head to the rear of the property and you'll encounter the flamboyant Bolson himself, boss of the construction firm which carries his name. He explains that the house in question is being pulled down at the behest of the village people, but that he can let you have it for 30 bundles of wood and 3000 Rupees.
If you don't have either of these to hand, it's time to do some harvesting. Wood can be obtained by heading to a forested area on the map and using your bombs to blow up trees to knock them down, then giving them a second bomb blast to turn them into bundles of wood (this is a lot faster if you have the Bomb Rune upgrade which increases the blast and reduces recharge time - you get the upgrade from Hateno Ancient Tech Lab).
There are plenty of wooded locations in Hyrule but the region just outside the Shrine of Resurrection where you begin the game is especially good. For Rupees, you're best off selling precious gemstones and cooking dishes which have a high resale value.
Zelda: Breath of the Wild Tarrey Town Guide: Hylian Homeowner Sub-Quest
Once you hand over the wood and Rupees to Bolson the house is yours, and you can move onto the next part of guide, building Tarrey Town itself. However, while you're here you may as well complete the Hylian Homeowner quest because it comes with some neat benefits, such as the ability to store weapons, bows and shields in your house.
Talk to Bolson again and he will mention upgrades on your property, which include mounts for your items and cosmetic enhancements. To complete the quest you have to purchase all of these upgrades at 100 Rupees a pop - the total cost will be 1400 Rupees, so make sure you have enough cash.
Once you've bought them all the quest is marked as complete and Bolson even gives you a load of free furniture to make your home look even better. Naturally, the bed in your house can be used to sleep in, free of charge.
Zelda: Breath of the Wild Tarrey Town Guide: From The Ground Up Quest
To trigger the "From the Ground Up" quest which eventually leads to the construction of Tarrey Town, talk to Bolson's co-worker, Hudson, who should be found right outside your home. He informs you that he's off to make a start on Bolson's next big project, and promptly leaves for the Akkala region.
Once he's gone, fast-travel to the Dah Hesho Shrine in that area, and then look to the north, over the cliff. You'll see a small outcrop connected to the mainland by a thin pathway. The island previously contained a stone statue at which you could pray and obtain heart and stamina upgrades, but now Hudson has started to transform it into what will eventually become the bustling Tarrey Town - but he needs your help.
Paraglide down to Tarrey Town and speak with Hudson, and he'll ask you for a rather modest 10 bundles of wood. Once you've handed them over, he'll issue you a series of sub-quests to find the right people to help this fledgling settlement grow.
Zelda: Breath of the Wild Tarrey Town Guide: Finding Someone Strong
Hudson's first request is for someone strong to assist in clearing the many boulders which are preventing the construction of the town. Head to the Southern Mine at the foot of Death Mountain and speak to Greyson the Goron - you'll have to do this at nighttime as he refuses to stop working in the day to chat with you.
Once you tell him about Tarrey Town he decides to give up his job and head there, taking his son with him. Return to Tarrey Town and you'll find Greyson hard at work removing stones, while his son runs a stall which sells gems.
Zelda: Breath of the Wild Tarrey Town Guide: Finding A Tailor
Hudson will now ask you for 20 bundles of wood to continue construction of the town. If you're running short then return to the wood near the Shrine of Resurrection to harvest some. With the wood safely delivered, Hudson then asks if you can find someone who can act as the town's tailor, as his own clothes are becoming a bit grubby.
Head to the Kara Kara Bazaar out in the Gerudo Desert (it's between Gerudo Town and the Gerudo Desert Gateway - you can use the Kay Noh Shrine or Daqo Chisay Shrine as fast-travel points) and look for a woman resting under a canopy. This is Rhondson (notice a pattern with the names here?) and she's more than happy to move to Tarrey Town and take up residence as the town's clothing merchant. She sells a Gerudo outfit made especially for men.
Zelda: Breath of the Wild Tarrey Town Guide: Finding A Merchant
With Rhondson now in place as Tarrey Town's tailor, Hudson has another request for wood - this time he needs 30 bundles. Once you've handed that over he will point out that the town needs someone with knowledge of sales and distribution - a merchant, basically.
You can find one at Rito Village - fast-travel to the Akh Va'quot Shrine and on the lower floor of the village tower you'll find a rather sullen-looking chap named Fyson. Tell him about the retail opportunity at Tarrey Town and he will perk up a bit. Upon your return to the town, you'll discover that he has set up his own general store, a useful place to purchase arrows.
Zelda: Breath of the Wild Tarrey Town Guide: Finding A Priest
Hudson's after more materials again, but this time he needs 50 bundles of wood, so you may have to do some more harvesting. Hand this little lot over and he reveals to you that he has fallen for the delectable Rhondson and wishes to marry her. For this, he needs a priest, and thankfully you can find one in Zora's Domain.
Fast-travel to the Ne'ez Yohma Shrine in the center of Zora's Domain and then take one of the winding pathways which leads above the Shrine. Look for a hunched-over character and talk to him - his name is Kapson and as luck would have it he's a retired priest. Needless to say, he doesn't take much convincing to leave Zora's Domain and travel to Tarrey Town in order to conduct the wedding ceremony.
Zelda: Breath of the Wild Tarrey Town Guide: Summoning Wedding Guests
Return to Tarrey Town and you'll find Hudson talking with Rhondson at her market stall. He will ask you to invite his co-workers Bolson and Karson to the upcoming wedding, so you'll have to fast-travel back to Hateno Village (use the Myahm Agana Shrine again) and speak to them.
Back at Tarrey Town, speak to Hudson again and he will begin the wedding ceremony - if it's too late in the day you may need to stay at night at the inn in the town. Once the wedding is over, speak to Hudson again and he will give you three diamonds, bringing an end to the quest. Phew!
Zelda: Breath of the Wild Tarrey Town Guide: Say Hello To Grante, The Best Merchant In The Game
But it's not quite over yet; Tarrey Town is a great base of operations but it has perhaps the most useful vendor in the entire game. Head up to the roof of the building next to the entrance to the town and you'll find Grante, wandering son of Robbie, the Akkala Ancient Tech scientist.
Grante collects special weapons and armour - he sells full armour sets for the Rubber, Barbarian and Climber sets - but the most amazing thing is that his in the only store in the game where you can buy special items that are only usually found once, like the Hylian Shield, should you break or lose them. Note that he will only sell these special items if you've already found them in the game proper.