@Joel *********
on your rotations I think you’d be fine just as you’re doing currently, I’m sure the odd visa exempt entry in between would be ok also,
those yearly visas are only relevant if you’re over 50 or married to a Thai or have Thai children then can apply for non imm o type visa
there is the wealthy approach I think can get 5 year or 10 year visa for that if you qualify financially, but I think it’s a bit pricy and certainly no benefit to me.
You can pull up the latest info from the Thai embassy website of the country you’re applying in, see if anything is relevant to your situation.