@Robert ********
Apply for a Non-Imm-O Retirement visa in your home country – insurance needed for the whole duration you get with this visa (90 days or 365 days) and proof of 5000.- Euros in your bank account. No insurance needed anymore when going from the visa to the Extension of Stay Permit
Apply inside Thailand for a “change of visa type” from a Tourist Visa to a 90-days Non-Imm-O Retirement visa – NO insurance needed but need to show 800,000.- THB in your Thai bank account. No seasoning time needed. However when going from the visa to the extension of stay permit, the 800K must have been in the account for 2 months
You can apply for a 365-days Non-imm-O/A visa only in your home country. You will need insurance for a full year after entry, and you will need to show 20.000.- Euro in your home country bank account