@Colin *******
you weren't required to show a financial proof holding a Non-B visa during the period you thaught at a school. However if you are now without the work permit, the visa options will shrink to only a few that can be used for a longstay. There is the 90-days Non-Imm-O family visa, which you can change into a 1-year extension of stay based on being married to a Thai wife. For this you need to do the financial proof, which is either 400,000.- THB in a bank account or an affidavit of income over monthly minimum of 40,000 THB