Depending on how long you're planning on sabbatical-ing, you might consider applying to the Recurse Center [1]. It's basically a (free) 6- or 12-week self-directed learning program that you do with others.
I had done a half batch last year and really enjoyed the experience.
Ha. It's long been on my someday list, since before the rename from Hacker School, and something that I've been explicitly considering for my sabbatical. I've glanced at batch schedules more than once in the past weeks. Glad to hear you enjoyed it!
I wonder if there'd be an appetite for this in an area w/ population of say 100k people. You'd still have most conveniences, but far less traffic, less distraction, etc.
I had done a half batch last year and really enjoyed the experience.
[1] https://recurse.com