I think what he's looking for is an extension of permission to stay based on retirement. First thing needed is a 90 day non-imm O then apply for the above. If you do not have the funds you'll have to try an agent, plenty in Pattaya.
I was explaining it, not recommending it. 😁 Like you the first time there was not much option but I have continued with it since. At my age health insurance not really an option.