@Jannie *******
Please don't hijack posts, but since this is similar enough, I'll let it slide.
>If I apply / buy a thai retirement visa OA in South Africa can it be renewed in thailand after 1 year?
Yes it can. You will need to meet insurance requirements though
>And will the same rule apply where you have the option of either 65k baht monthly or 800k in bank or a cimbination of both?
Yes, you need to meet the financial requirements.
>If I should exit Thailand during the year and return does the time reset to one year when back in Thailand?
If you are on a one year extension of stay, the time does not "reset" when you leave Thailand. Your original visa would probability be used when you get the one year extension of stay. If you return, you must have the same insurance requirements as the Non-OA visa.
To prevent further hijacking,I'm closing comments. Thank you.