The Fort Galt project may end up constructing a second building once the first one is done so you definitely want to stay tuned for that! :) It may offer the affordable options you're looking for.
I'm not a gardener myself so unfortunately, my knowledge in that area is very limited but I have seen some small farms in and around Valdivia so it appears to me that it's not a problem. Here's a local farm that you can check out: https://www.facebook.com/GreenStyle-Valdivia-1496804783922135/?fref=ts