I go every month and have been doing so for more than 6 years (except through covid period) but started straight after covid again. On average I went 10 times a year 2 weeks each time.
correct rarely but they can and do. I arrived every 2 weeks exempt and did for about 6 years never stopped on arrival but decided to go the 5 plus 5 visa to be safe
That's of course another option. I did 2 weeks into Thailand every month for about 5 years and never got questioned but always had return flight booked. One never knows when they will say enough
Your TM30 from where your staying. Not all want but best to be prepared
2 passport size mug shots
1900baht cash
Complete the form at the immigration office you are staying near, some allow you to go weeks before your 60 days are up and some are in the last 7 days, be aware of public holidays when immigration will be closed