You don’t need a visa, it’s just a stamp on arrival.
Normally, you can just get back again for 60+30( extension ) days .
But officers can inteview you.
They ask:
- where do you go next ( better say you come back home )
- a ticket back home ( can be just a ticket to any country , a ticket OUT of Thailand )
- your stay booking of the hotel or other accommodation
-
*****
thb in cash (!)
- maybe insurance.
- you don’t work in Thailand , PERIOD ( even you work online , you don’t mention this ! )
That’s the most questions officers ask: the right answer should be what I told.
Also, I recommend to use agencies to avoid fucking your brain on the border.