Need advice 🙏

Hello, I’m going to Thailand in early February with a return flight from Bangkok for the end of March, which is more than the 45 regulatory days. During this period, I only stay 3 weeks in Thailand and the rest in Laos and Cambodia. I applied for a tourist visa but they want accommodation reservations for half of the stay! How to get the visa and is it necessary since I don't stay 45 days in a row?

Thanks a lot for your advice 😊

My Son works in Iraq

He is on an 8 week rotation so visits Thailand for 2 weeks every 8 weeks.

Is he required to file TM30? He usually stays in airbnb's or hotels.

Has UK and Australian passports. Given recent tightening of TM30 rules I'd like to know for sure. Jomtien immigration would be where he would need to go if required. He only stays 14 days. Then returns to Iraq. He always has forward travel. Not necessarily a confirmed booking for accommodation. Cash not an issue.

Thank you.