In theory within 24 hours, but there are no checks so any time seems ok. Major requirement is to have a valid one for any immigration office visits eg extensions etc
Suvarnabhumi, international exit 2 after security control, just before immigration control, far left as you face the passport control desks ...
1200 baht, only passport needed, altho if you prefill the form and have a passport sized photo ready its a bit quicker than the usual 20 minutes and cheaper at 1000 baht
you need tm30, your tabien baan is a yellow book yes? The house 'master' your wife or maybe you, can register for giving you a tm30 ...register via the tm30 website
Presumably that would apply for any visa type extension?
I am currently on rolling non imm o (retirement) extensions but do have an option of applying for a DVT ...presumably I would have to let the extension expire then apply for a DVT out of country? Can not apply for a DVT with a valid non imm o extension? The attraction being of course the 5 year nature of the DVT visa (I spend only 6 month or less time slots in thailand).