This is a great idea -- and I'd like to add in that there is a calling for many to return to their ancestral roots and land. It may be simply a matter of time. I am Norwegian and Russian Jewish; for me, the idea of moving to a Bulgarian village feels exciting but not quite a fit. What comes to me instead is to connect through sharing ideas and encouragement. If I move to a village I think it will need to be a returning home, rather than a new place. But if I had the money to get to Bulgaria for a while and help out, or to go to California (see my other idea below) then that would feel like a fit to me.
Also, I think that there must be easier ways to work; with all respect to the old ways, the rapid flow of information today allows for many new ideas to be considered and tried out. Try out fifty of them, one a week, and if three of them don't fail you may have things much easier! Clearly we are all being asked to change in these times.
The problem is the solution--few young people means more___? as you say, opportunities for people with little money and big ideals to move in...what else? what other opportunities does this problem create?
I was going to post an idea that came to me--
barren almond fields in the Central Valley in California.
Dying/dead trees.
So: hugel beds, swales like the ones the WPA did that Geoff Lawton discovered still fertile in the midst of the Arizona desert, even without any maintenance for decades. You could probably get cheap land that on one else wants there in California and reclaim desert.
Build up swales with wood as well as dig in.
Problems are --land is soooo flat. topsoil is so dusty. there is SO little water--getting started would be difficult.
Ethiopian water-condensing doo-hickey might be useful so you have stuff to drink to start off:
http://www.wired.co.uk/news/archive/2014-03/31/warka-water-ethiopia