You have more than enough. A voter registration card ia also a good one. Make copies and include all of it. Bureaucrats love paper. If you are in Thailand and teaching, it is really no problem. The embassy staffer who will do the interview sees your situation all of the time. The most important thing is the financial section and you can even skate on that. Remember that if you are married for aat least 2 years, you can do a direct consular filing which is faster and easier on you and your spouse when you get to the States. You won't have the hassle of ongoing paperwork with immigration and green card interviews.