Working on a tourist visa is illegal in most countries I've been to. If you talking about working online on a business which is not tied to the country you are staying in, then you can do that on a tourist visa for a short period of time, but eventually if you are staying longer you are no longer a tourist and need to somehow justify your presence in the country. As much as those laws don't make any sense to people working online, that's the current legal framework in most of places.
Where are co-working locations?
I don't see a point of working in a coworking space. Wouldn't you rather explore nice cafes in the area? The only benefit of a coworking space for me is networking, and this is huge, this is what distinguishes a "I'd rather go to a coffeeshop" coworking spaces from "I belong to this community" type of coworking places. Those are extremely difficult to find, and in my experience are impossible in high-traffic nomadic locations, due to their nature (travellers just pass by).
Where are the best locations for connectivity vs. price?
You look at the spreadsheet at nomadlist, and some places look like paradise - live by the beach, very cheap, etc. But in my experience everything comes with pros and cons. For example, SEA is cheaper than Mediterranean countries, but the climate is nowhere near as good. USA is better when it comes to networking, but it's also more expensive. Everything comes with a cost, and there is no magic bullet.
