My non OA extension started at LA consulate in 2007. Still extending annually. I just have a separate account where the 800k stays here. In USA applying at consulate could use funds in bank there. Once here opened accounts.
I came numerous times with family on various visa. Far easier in reality to go back, do the visa there FIRST as can use bank account etc there for initial visa. Then you come and have adequate time to easily prepare for extension vs trying to slip slide around to obtain a visa . IE we planned so far ahead we purchased property and added fill months on a 60 day visa, before I did retirement visa at consulate so one way ticket even on that entry. Now only round trip with reentry permit in passport.
Each office may be different but most if you leave the nation even border bounce requires new tm30. As typically when we go out , coming back stay at hotels a few days or weeks before return to private home, next day go immigration do tm30 as hotels report between. I've known some fined 4 6 10k thb for failing to report and thinking it's ok until doing 90 day. It's your LOCAL that decides
funny my tm30 is from there 2017 and they know I often go kk for medical treatment, just transferred that tm30 to new passport, no problems. But I've been traveling internally for meetings and medical for years. They know I spent a few weeks there when wife was extremely ill and hospitalized for specialists to figure out cause for example. Hint roll with the flow until they know you. 2008 was bad time as kept wanting more copies etc and other stuff. I smiled and complied until granted extension.
I've traveled all over isean and beyond, but only stay at hotels, no private residence but ours. TM 30 now pre covid. Immigration just transferred to new passport.
Almost 20 years ago went to report at local police station. Told we know who you are and are here again. Welcome back. Tell immigration next 90 day report. They do that form.