I've been doing photos since 2000, so let me give you a few pointers.
Ryan is correct, dealers look at this like a commodity. The systems, are for the most part commodities, the people servicing the systems are not. We have guys in the team with 10 years of experience in data collection, photos, feeds, DMS issues, photo locations, etc and we even notice a difference between them and the guys that have 3 years of experience. Finding and keeping good people, whether is a vendor or in-house, is not a commodity.
The biggest difference between vendor and in-house; with the vendor you pay a little bit more and in-house you are responsible for tech support, hiring, training, retraining, supplies, equipment, sick days, vacation days, insurance, taxes, etc.
If you have a problem you must resolve it by talking to the people that can fix it. There is no difference whether you pay them via payroll or mail a check.
For those that think that if you take you save tons of money... That seems to be the case with lots of businesses when you look at them from the outside, right? My photo business, with 300+ dealers in one state, doesn't have any better profit margins than any other "service industry" business.