The parent mentions the DTV visa which is the opposite of the visa-run strategy. Realistically though, if you're a "nomad" from a country with a powerful-ish passport you can come to Thailand for 60 days, extend once for 30 days for a total stay of 90 days. After that you can do a bit of a loop between Malaysia, Vietnam, Cambodia, Laos, Indonesia, Philippines in whatever order you prefer and come back to Thailand in a year. They'll have no problem letting you in again.

It's pretty easy to spend a year in SEA without raising eyebrows at any border if you're willing to change countries somewhat often and don't mind AirAsia flights.