@Ross ******
do as Stuart said regarding the non-o visa, once in Thailand get the TM30 from your hotel/condo (you might have to ask for this) then go to your nearest immigration office and ask to change it to a residents certificate (it'll cost about 60 to 70thb) once you have your certificate go to the bank with your residents certificate, printed copy of your non-o visa and passport bio page, your passport and the 800,000thb to be deposited, I recommend Kasicorn bank (the green one) once it's been in for 2 months then ask the bank for a statement so you can apply for the 12 month extension (aka retirement visa) to your non-o visa, good luck and hope this helps you ๐๐โค๐น๐ญ