I appreciate the reminder. Some of us belong to 10 or more Facebook groups and it can be difficult to remember the rules for every group. Maybe add something about no agents in the group name.
yes. This! You have to leave every sixty days if you don’t extend but it can come in handy. But since you are saying at least 8-9 months, check into the variety of NonO visas
Make sure you keep an eye on the potential new taxing method next year. It might be based on amounts coming into thailand. If so I might just stick with leaving 800k in Bangkok bank getting tiny interest.
Or you can get six month multiple entry tourist visa which allows you 60 days at a time with the ability to ext by 30 days when you get close to end of 60 days. Or you could look into over 50 visas NonO or nonOA.