You can start a company manufacturing umbrellas, but you won't get a work permit, because umbrella making is reserved for Thai people, not for foreigners giving themselves silly Thai names! 😂😂😂😂
Used Dee Money for the last couple of years but I wouldn't advise it now. Long delays and then they say can't do the transfer and then you wait another 2-3 weeks for refund
The point I'm making is that with a non-O there is zero requirement to ever the leave the country. They're called "non-immigrant" visas, and can be extended indefinitely. The DTV has a 360 day limit before the holder is required to leave the country, and at the end of five years the visa expires, and it is necessary then to apply for a new visa outside the country. Non-O visa has none of those requirements.