I live in Los Angeles. Cost of living here is not cheap at all.
However I can chime in. If you can somehow manage to make 3k USD a month from your laptop, here is places where you can live very comfortable:
Mexico. Places like Mexico City, Guadalajara, Ensenada are beautiful. Don’t believe the propaganda about the cartel. Most cities are peaceful. I have friends who live in Mexico and right now there’s a huge exodus of Americans moving to Mexico, so plenty of English speakers.
Thailand-Prices have gone up in last 5 years because word got out to westerners, but its still a great bang for your buck. Bonus points if you’re into Asian chicks.
Armenia-small country but the dollar goes very far. Good healthcare system, cheap medicine and the people know how to live. The culture has a great work-life balance.
China-Please check ahead that your money making venture on your laptop is not blocked by the Chinese firewall. China has very low cost of living, but same like Thailand, word getting out and a lot of westerners are moving there.
Costa Rica-This one you may need to bring in 3.5k USD a month to live like a king. Big American retirement community. Probably one of the safest countries on the planet.
Uruguay-The most developed latin American nation. Same as above, this one you may need to make closer to 3.5k a month if you want live like a king. Safe as well.