I've done something like this. After quitting office work I followed up with working remotely. I'm not sure if I could pull this without spending some time (1+ year) in office where I was able to build connections that allowed me to find remote projects without too much hassle.

As another comment was suggesting, key is to find work for client who is based in "rich" country (for me right now that's US, some of the Europe) and is ok with you working remotely.

If I wanted to work in current location, I'd have to take significant salary cut + start pulling those mentioned 40h/week