What Are the Requirements for Converting to a Non-O Visa in Thailand for Over 50s?

Hi all and thank you for all the comments and advice. To try and make it simple I am not going to give a lot of background but keep to the facts. I arrived here on January 30 with Visa on entry. I extended for 30 days and then got an extension supporting letter from the British Embassy.

Long story short, I went to Hua Hin Immigration yesterday and was informed I needed a number of supplementary documents and I returned to the office of the company where I am renting a Villa and went back. The staff there were great and checked all the documents and gave me a que number. When I went up stairs I was told only 7 days until she saw the Embassy letter but it turned out that I was missing the copy of the blue book for the lessors home.

I returned again today with exactly the documents that were required and the staff downstairs checked them and told me everything was ok. However, when I saw the officer I was refused on 2 grounds. 1) The embassy letter was not signed but The British Embassy told me. when I queried this when I first received the letter that this was not a requirement. 2) The owners name was not on the Blue Book but I have been informed it never is!

This is not a whinge and I fully understand that everyone is under a great deal of pressure at the moment but just a heads up for people that might need to make the same application.

One further question, I am over 50 and have a villa being built with completion in about 3 to 4 months. I have the funds to deposit to get a residents visa. Is this a possible option?