Just did the quarantine in Phuket July 2021 ($1275.00 at the Marriott Merlin Beach), after doing one in Bangkok in November 2020 ($2500.00 at what we thought was a nice hotel... It was not).. We were on a O-A Retirement Visa.. If you have any questions you can PM me..
if your wife is going on a OA Visa then she has to have her own money she cannot be on a joint checking account with you and use joint money as her income..
I can definitely recommend the Marriott at Merlin Beach if you do the Phuket sandbox it was absolutely a wonderful quarantine stay and the price was half of what we paid for asq last fall