If you are over 50 you can get a Non O visa ‘for Retirement’ that will give you 90 days but you can’t extend it for another month, only for a year which will require things like funds in bank etc or a fairly expensive agent fee. If you plan to visit each winter then it might be worth it?? as you can get an extension each year.
Otherwise you will have to leave the country and re-enter as the previous reply said.
Edit: I’ve just seen you’re in Canada? If so, the Embassy there is known to be rather unhelpful so the Non O may be an issue.
It can vary depending on Immigration Office which makes it quite confusing. You need to check with the office you will be dealing with.
To the best of my knowledge, Jomtien is one that DOES require the funds in the bank and maybe even 2 months before. Please check with them in plenty of time.
Yes, you can. The only condition is that no more than 49% of the condo building can be foreign owned. So, if a condo is in a Thai or Company name it can only be put in foreign name if there is quota available, which is why Thai name condos are often cheaper. There is no issue changing from a foreign name to a Thai name.
I’m not sure if you’re being deliberately obtuse or you just can’t help it.
Have you actually read the original question? If you arrive with tourist visa, or on Visa Exempt, have no bank account, do not have 800k and use an agent for everything - converting to Non O, first annual Extension including a multiple Reentry permit, then around 30k is a pretty standard price. Some agents charge more.