See. It's already going to be an awesome game.
I can recall having some troubles getting some items for potions (in OB and MW), but it never really bothered me that much. I guess if I buy a house with a farm plot next to it then the question could be, will I be able to plant anything I want (where would I get seeds), or just keep growing what's already planted there (corn, pumkins, etc.)? Personally I always wanted to have a wine vineyard, so would I build one from scratch or just buy one and maintain it?
I think it would work similarly to how property worked in OB, you bought 'titles' or 'deeds' that permitted you to have like beds, containers, kitchen ect, but the same for wine vineyards, if you want a vineyard, you buy the deed for it and there it is when you go to your house. i could see this working for any other kind of plant you could want.
the trick could be to find the deed for the more rare plants like the Mana Bloom
If not in the actual game, id love to have this as a DLC where you can add a smithy to your house, as well as a farm (if your house doesnt already have one) and a place to cook.
i would also like to see house titles have property, and not just the house. Like have a cool cave on some houses that leads to a secret lair or something. Or a waterfall with a cave behind it. i could see many awesome house styles that could be beautiful senery wise.