I am not that good but I think you have pretty much of what you need to file for now...
_first prepare you application from the first meeting, before pictures, engagement, marriage, after marriage.
_sworn and notarized affidavits from family and friends who know you both well
_Emails exchange of before and now
_cash receipt
_bordinary passes with stamps
Honesty...
Then while your petition is being reviewed you can make as many visits as you would like..