out of Thailand anywhere. Google throw away ticket a lot of people have used them. If you are arriving on 30 day visa the flight has to be within that time period. Airlines / immigrations don’t entertain people’s plans about getting long stay visas they just follow back and white. Extremely unlikely you will be asked for anything when you arrive in Thailand if you haven’t got history of visits.
pretty sure I stated that when referring to “unique” but you mostly find they cut their fees to zero but not the Thais atms fees. Cash is also a good option for people wanting to get the best rate possible.
You can extend at immigration for a further 30 days without any issue. You can then do a border a bounce by land , receive 30 days and extend at immigration for another 30 giving you 120 days in total. Without too much hassle. After this there is no concrete written laws, it’s up to the immigration officer, luck etc. if your a genuine tourist and travelling in the region for touristic things it will be a lot easier to prove. If you plan staying longer than 6 months on Thailand it’s probably best looking into ED visas or what else is available.
last time I was questioned before I simply showed them my travel plans and nice places I’d visited and they could see I was genuine long term tourist. People up to no good or working illegally normally struggle to provide these things.