After you arrived in Toussaint and followed the Mainquest a bit you get your own Vineyard.
To upgrade your Vineyard Corvo Bianco
completely you need 14.000 crowns, that may seem a lot but after killing countless Bandits (good spot is here
, also make sure you sell them at a Blacksmith/Armorer) and selling there Weapon this shouldn't be any problem. Also check your Inventory, I sold a lot of crafting materials that and got over 10.000 crowns out of it.
First you can upgrade your House (5000 crowns), add an Armor Repair Table (1000 crowns) and a Grindstone (1000 crowns). After that you need to meditate for about 3 days for the Upgrades to be completed.
After that you can build a stable for Rouch (2000 crowns), a herb garden (2000 crowns), a new bed (1000 crowns), a weapon rack (500 crowns), a armor stand (500 crowns) and a guest room (1000 crowns). meditate again for two days and your Vineyard is fully upgraded and you get the Playing House Achievement