, (editted) what you uploaded is the requirements list for a short-term extension based on Clause 24, visiting Thai family for 60 days. This extension can be applied only once per visa/visa-exempt. And this doesn't require proof of funds of 400K baht.
If you want to apply for a long-term, 1-year extension based on being a family member of a Thai national, you need a requirements list for clause 18. This requires proof of funds.
, Membership is not stopped or postponed. you will keep using other privileges on another visa. just not using visa part of the membership. When membership is expired when it’s supposed to be expired.
Dear members, this is the requirements list for a 60-day family visit extension at CW, Bangkok. NOT for a 1-year extension based on spouse or parent to a Thai, NOT for other offices.
, Maybe OP has to consider, as it depends on what actually "my wife does not qualify for her own O-A visa" part means. In most requirements same to Non-O retirement visa