I think also that there is no benefit to change your NON-O (marry) to NON-B
Maybe i am totally wrong
I am married and have now a 60 day extension based on visit my wife
My wife and i have a company here in Thailand,however i not "work",i am just a share holder
On my research to change my visa into NON B,i not see benefits
With my NON-O visa (single entree) i can stay every time 90 days + 60 day extension
With a NON-B i can get 30-90-1 or 2 year workpermit but i have to leave each 90 days
Maybe i am totally wrong about this and other members can tell what option better is.