There are a few ways to achieve this that I am familiar with:
1) fed gov't job (relatively decent wages even in rural super LCOL areas)
2) having an awesome job in a HCOL area, then asking to work remotely/from home permanently, given approval to move.
3) have a traveling consulting-type job, doesn't matter WHERE your home base is... You just have to be on-call and ready to fly anywhere in a moments notice, sometimes for long periods of time.