Kato,
That picture with the flag just totally won me over!!! You seem like a great guy with a great attitude, and as a mom of a fraternity member, I think you would be a great role model for the group. I hope that you can find a house that will overlook the "married, older guy" label and instead see the "head on straight, mature outlook and perspective guy" label.
You can just be the token - Old Guy
(just kidding!)
Good luck!