Can my wife apply for a work permit on a Non-O marriage visa in Thailand?

Hello I'm Thai and currently working in Myanmar, I'm married with Myanmar wife here with completed legal document. however i plan to come back for working in Thailand next month.

My question is..

1.) If my wife will do non-o marriage visa (Thai husband) and follow me to Thailand, after that can she apply for job or get work permit for working in Thailand?

If can not so can change marriage visa to non-b business visa for apply job later or not? and my wife can do this method in Thailand or need to trip back to do business visa again in Myanmar?

2.) For non-o marriage visa (Thai husband) if my wife need to stay longer in Thailand, Did she need to open bank account and put money at least 2 months before apply extension for 1 year marriage visa and need to put money at least 400,000 baht or how much?

Thank you for your all kind answers