It seems to me that if you are willing to spend less than 90 days in each place (on tourist visa / no visa) then you don't need to be resident anywhere? wany3, you know anything about this?
Technically, yes. Practically, if you are a resident of nowhere, you cant claim jurisdiction anywhere so every place you visit will just fuck you over whichever way they want. If you want to pay no taxes, you need to take up residence at a place that protects you from other governments through treaties.
The thing is that they just assume tax responsibility, so as long as you dont live somewhere that explicitly sets a tax rate to 0, you dont pay taxes so theyll make you pay their tax rate.
no legal advice