Thanks everyone for the comments, kind words, and ideas! Like I figured, this is helping me process what's going on and think through options. And clarify what's important...
There's lots going on in all of this (like in anything), here are a few more of the things swirling through my head.
I have thought in the past about starting small, getting friends to help, and so on - but thanks for reminding me and giving some more specific ideas. William, I think there's really something to your idea of trading some of the space for some help.... Not sure if it's something I could pull off at present or not, but worth considering.
And John, yours on sitting on it and/or on getting help, with my input being the planning. Alas, I don't think I'm really there yet either, have some of the basic ideas down, but not ready to "do" my own project. I am in my early 30s, so (Lord willing) plenty of time yet. Real access could possibly be arranged with some effort and probably expense; although I do have an informal agreement with a neighbor that can get a pickup (which I don't have) at least to my border.
Stepping back a bit - When I got this land, I knew it would either be a long-term project, or that I may not be able to keep it, because I was already sick. In fact, I bought it with some insurance money, so it's even more natural to use it to support me through this time, that's what the money was for originally.
Plus, I may be getting some help from my community already towards some treatment....makes me feel even more responsible for doing all I can, to honor that, even if it means some sacrifices. A lot of the counsel I'm getting is to sell it. As we've said, giving up on something now doesn't have to mean forever. And boy, the cash is very tempting (I got an unsolicited offer in the mail)...
However, difficulties have a way of clarifying priorities, and I am considering some other ways I may have to help the short term.
Thanks again everyone! I'm still chewing on stuff here. Feel free to add anything else that may pop into your heads....