As repeated already above, there should not really be an issue, if you have not done this multiple times before. On the other hand, it still depends very much on who, and what mood, the immigration officer is. I would take @Rob Browder advise and take copies of everything to be on the safe side.
After that, please get a 1 year extension and use multi-entry permits if travelling in and out. The amount should not be any problem for a person who entered and committed to a marriage in Thailand. As you already assured it´s not an issue, that will be your best option.