I just applied for my dependent visa this past Monday. We got married May 1. Wife makes 45 to 50ish a month. We have been together for a while but the immigration lady said just our marriage cert was enough - didn't need any photos or other proof of a relationship. It does say where we got married (which was at a big hotel)+ - maybe that helps a bit than if it was just in a rush with no huge party, etc... I am working in China still, and will be for a few more months...
Anyways, that's just my story. I have heard of crazier stories than yours and people still got approved.
Good luck!! With the visa and the coming marriage. It is a big step. DON'T do it ONLY to get him there with you for now, make sure it's something you want forever. There is no real way to know for sure, but just make sure it's what you think you are feeling at least ;-)