@Andrew ********
on your second visa-exempt entry you might get asked for the three famous proofs: 20,000 THB or equivalent, in cash. Proof of a few booked nights of sccomodation. Proof of onward travel within the first 60 days. . . . . also, the onward travel proof can be asked by the airline! Anyone who is flying visa-exempt to Thailand CAN get asked for an onward travel proof out of Thailand within the first 60 days, so beware