Building the farm …
Goods, feed, fuel and food run on coins. Land, animals, workers and equipment belong to the wallet.
The game reads which worlds and pieces the wallet holds and loads your saved build on top. None of it is lost when you disconnect. Sell a piece on OpenSea and it leaves the farm with it.
Prototype with a demo wallet. ETH and OpenSea follow. Buying and selling happen there, never in the game.