Ghost Villages for Sale in Spain
I'm sure there are plenty of people who can work remotely who would love to live in a place like this, if it were either turnkey or at least if there were some collective action organization.  Makes even more sense in Portugal, though -- you could live in a place for 182 days/yr, after putting 350k euros investment into it, with a grant of portugese citizenship.  I'm sure there are similar villages/properties in rural areas too.