Just thought I'd give my experience with doing weddings. We started out with doing weddings with friends or people we know. Instead of really charging for them I basically had them cover the cost of equipment rentals (around $250). We've had a couple that we went a little over that and made a little profit. We've now shifted up to around $750. There was a mix up with this last wedding so we ended up doing it for $600 by accident but it's all good. We got some great pictures and it's really going to improve our portfolio a lot. For us starting out, that's the biggest thing I'm looking for is what's going to improve our portfolio. We're finally to the place where I feel we have enough work to get in the $1250-$1500 range which is pretty much where I think we need to be for the amount time it takes. We currently are telling clients if they put down a deposit before the end of the year it's the $750 but it's going up next year. I know we under price ourselves but I'm not doing this as a permanent rate and we've really been able to bless some people out that wouldn't have been able to afford anything or (shutter) some of those people that really shouldn't be doing a wedding with the gear they've got. Anyways, so that's our take.
Regarding people mentioning not getting the 5D Mark ii, I understand where they're coming from and I'm already wanting to try out the mark iii at a wedding next year but honestly I was blown away by the increase in quality going full frame. I shoot at ISO 800 on my 50D but on the 5D most inside stuff is shot around ISO 3200 which really gives me a lot more freedom. Not only that but I rented the Sigma 85 1.4 and found it to be way too long on the crop body but on the full frame it's more manageable. My thought is either rent nicer gear for the time being or invest in glass. The Mark ii can be an excellent deal for what it is if you can find a good deal. I got mine for $2400 with the 24-105. The Mark iii has been coming down in price and you'd be better off putting that money towards some nice glass for the time being.I actually haven't even tried it but the 35 1.4 springs to mind as it would work very well on your current crop bodies, it's on my list of lenses to rent, and once you go full frame it'll be awesome there as well. I use the 35 2.0 currently and it does well on a crop body so I'm sure the 1.4 is that much better. I know you didn't ask about equipment but since others chimed in, I thought I'd give my opinion on their opinions
Sorry for the poor quality (was taken off of our Facebook account), but this is an example of a shot I don't feel would have been that great if it wasn't for being on a full frame and having a nice prime. You're work is an excellent example of not needing high end equipment to get some nice creative shots but that's inherent in your work and so nicer glass/ff will give you even more creative freedom