Just slipping in to encourage you to ignore the vacuous comment. I am aware of all the things you alluded to. Land restrictions can be surprisingly strange. I mean, I know geriatric people who've been fined and endured attempts by the city/county to steal their property because their grass and trees were too unwieldy, requiring class-action level intervention to save them. The patented seed has a well documented precedent, but is probably moot for small farms. Water, you can expect, to be an extremely contentious issue in the future.

Stay informed, build positive networks of similar minded/valued people and choose your spot wisely. I have lived on farms, but I am far from a guru on the subject. Your list of concerns, in my opinion, is far too short. If you take land seriously, keep learning, and don't let ankle biters discourage you. Freedom is important for a homestead or farm, and not every district agrees.

I will tell you of a serious problem few speak of... Sludge(1). It has been used all over the country, especially in Florida. It can have permanently disastrous effects on soil, replete with your 'forever' chemicals and such. I advise looking into that before buying, if you want organic. A lot of prospective farmers buy land, then have it tested, and discover Sludge has rendered it unfit for even conventional farming.

1. (bio-solids, along with everything ever flushed down a toilet or run down a sewer or drain, and then some)

Yeah those are pretty weird questions. I suggest you may have been spending too much time online. If you ever come across someone marketing property as the ultimate in Libertarian dirt, I would carefully investigate what liberties have been taken with it prior (dumping out New Jersey sewage trains, for example).