all those factors are worth considering. I submit that they are secondary to another issue, and thats the ETHIC of starting a homestead. I got homesteaded at as child; my folks bought beautiful rural land with no blemishes, logged the crap out of it, built a house, made a bunch of mistakes ended up with afarm that they couldnt manage and then thier house burned to the ground.
ad frankly, in many ways, they did better than most- they were able to be off grid, without a well, organic, etc, for 15 years but as they aged the system was too big, and the input requirements too high.
my only advantages are that i saw thier mistakes, and now, on the same piece of land, im restoring habitat and building smaller systems- as well as bring in partners. the lone ranger homestead is doomed to fail; and damaging a lovely piece of integrated and functional nature - a very real possibility for even the best permie when they choose to design in a functional ecosystem- is a surprisingly common.
I tried to embed the image, but im slow sometimes. here's a link to cartoon that makes a short summary of my thoughts
http://1.bp.blogspot.com/_Ymx9e66vrGc/SpIlbVBbHCI/AAAAAAAAK1Q/w6psh6WBmx0/s1600-h/SKMBT_C25309082112070_0003.jpg
I submit the ETHICAL choice is to find damaged land near a community you love and feel supported by. then youll have the personal network to refect communally about how to design the site, share meals and adventures, and at the end of the day any mistakes- the inevitable teacher we all live with- will not be banging up an already function ecology, but just another goober in a messy place. in this placewe can take two steps forward for every one back, or even do a 3/2 ratio, and be moving as fast towards real soultions as the best designers are. and in sharing those you help us all.
on the other hand, at a undamaged local, even the best designs will bang up the existing systems. I;ve seen it over and over again, and its very frustrating to watch habitat and habitants suffer even while the human neighbor means well.
scared wildfire lands, esp box canyons, are common now in so. cal., and present affordable land that needs restoration; degraded farmlands and dead industrial monocrop lands are another great choice for rehabilitation. or michigan's detroit-flint wastelands, which is having a huge urban permaculture movement take off from what I hear. lots of empty lots, cheap houses, community gardens, and neighbors who are ready to be neighbors - they need to cause thats all they have. I hear the big easy is having the same issues.
wells cartoon (above) is cute and gets to a point- the house doesnt have to be underground, but its nice if you can pull it off. more important is building with some guidelines, such as the living building challenge (
http://ilbi.org/the-standard/lbc-v1.3.pdf)
im a homesteader. i was drawn in almost 30 years ago, as a 12 year old with a couple of wild eyed parents. they were both smart and capable. and they, though no intent of thier own, kinda hammered some soil and forests hard. I wouldnt know half the things I do if i hadnt been with them and watched their mistakes. I love the homestead, and now its a sane choice to be here, to fix it up, maintain what works and start new functional systems. but I would also tell anyone that the most important thing ive learned about homesteading is summed up in the above cartoon: love nature, leave it to its gig, and fix what our forebearers broke by re-inviting nature in. its good work if you can get it.