ok YOUR ENTERING ON NO VISA. That's called VISA EXEMPT They are questioning on your purpose here. Always have baht in your pocket always tell them you are a tourist. Change your place to stay as if you show the same residence they think you have a gf
Never tell them you have a Thai girlfriend. Space your trips into here as too many and the IO may deny you. Otherwise go for a long term visa.
max worked for me heaps of times and the hotel prints it on a4 paper. Used in Buriram many times and korat ice. What IO are you talking about. Oh tm30 is I think your a bit confused. Yeg 90 days online are pretty easy after the initial one