the question is how many times you can apply for, not maximum number of days you can stay. It's a single entry visa regardless if you stay less than 60 days and I stated staying only 1 day 🤷♂️
Under the tax treaties, Thailand is required to give you a credit on foreign tax paid on foreign income. Thailand has never developed a tax credit system... But is expected this year. Since it has not been created yet, we do know how it will work given that Thailand is essential taxing remittance in different years than the income...you will have to wait and see. 🤷♂️
The best advice I can give on "double tax treaties", is that they don't stop you from being double taxed, rather than tell how you will be double taxed.
Your resident certificate is your address. If you get a resident certificate from chonburi it will be your chonburi address. The moto will be registered to that address and province. You will need to complete the process in chonburi as you will be issued a chonburi plate.
the DTA is followed, assesable income is determined by both the DTA and domestic law. So even if an foreign income type is assesable it will only be upto the amount brought into thailand. There still lots clarification we need, how RD will handle commingled funds, will funds be considered regular income, or preferences treatment of certain types, etc.
no where in domestic law or international treatiee does it state income is exempt of you already paid tax on it.
Generally, DTA make government pension taxable only from the government that issued it. Private pension are going to be taxable where you are a tax resident, which for retirees in Thailand, mean Thailand. It could even be taxable in both (then credited) depending on the souce country (US especially).
It also has nothing to do with your passport or citizenship, only the countries involved. If a UK citizen is receiving a pension from France and lives in Thailand, the factor of UK citizenship does not effect that.
Really that's not issue, it's how to file the tm30. I have often wondered this myself. If you can file a tm30 for boat, slip, or harbor, you shouldn't have an issue getting a resident certificate for that address in theory. Please report back when you get it figured out.