Mate you need very good financial advice from a professional in your own country.
Under no circumstance tell your ‘spouse’ or the Thai authorities about your true financial position.
You need to move over the minimum required for the visa. The rest stays at home use a credit card issued at home and pay it off from from home via the internet so there is no trace of your wealth in Tland.
People with lots of wealth in Thailand and a wife have been known to ‘commit suicide’.