Ic.org is a good place to visit to see what exists and you could emulate, it was started from a community called Twin Oaks that has quite a radical approach :-) I learnt about it from a book called "Is it Utopia yet" picked up in of all places Nuremberg... honestly agricultural land is cheap (2k a hectare) in non productive places and vegetable gardening or just plain planting stuff for lols like from "plants from a future" (pfaf.org) interspersed with a couple of weed plants should cover expenses... strawbale housing, adobe or trailer parks are much cheaper options at least initially... Gas made from compost, shit or wood chippings is a great alternative... https://en.m.wikipedia.org/wiki/Compost_heater