I once was out shooting a castle ruin with my Tachihara camera. A girl came up to me, and was interested what I was doing. I showed her the camera and explained a bit. After a look through the camera, she said: I would hire you for my wedding if I had one...
I have never pursued this option yet, but I seriously think you could make real money shooting just 10-20 LF formal photos on a wedding, taking into account all other positive responses I have had to using that camera out in the field.
And even if you would shoot anything else (non-formal on rolls of 35mm or 100's of digital shots), these photos would get lost in the barrage of all other digital photos taken by family, friends etc... By the time you have your photos ready, the wedding couple will be numbed (and that's from some experience I heard from a female photographer doing that kind of work).
In the end, tell me, who is really interested in seeing the 100th photo of a distant cousin eating a steak at your wedding party???