. States clearly in application that you can't be employed or operate a business in Thailand on an elite visa.
Getting caught and doing it are two different things. That's the risk you take. Why spend millions of baht on a visa when tou can invest it in a business here and be legit and keep the money?
. The purpose of a kor ror 22 is to legally recognise and register your overseas marriage to a Thai citizen in Thailand. It can be used to get a spouse visa.
Having said that, Thai culture puts great emphasis on children, especially very young kids. You will find that they will go out of their way to help you if you have an infant with you. Prams will never be an issue on your travels.
A multi entry non o let's you stay for at least a year anyway. Maybe ask the question in a years time when you know where you are living. Way too early to be thinking about short extensions when you can get a yearly extension on your non o anyway.