.RV fridges come in 12v DC, natural gas, and 120v AC and because they are more or less a specialty item (created for the RV and marine industry) they are more expensive. A standard home fridge runs on 120v AC and are relatively cheap. I run a small household, 120v AC mini-frdige/freezer combo and it works just fine on my 15amp system. The important thing is to get one in which the freezer is a separate compartment than the fridge so you can actually have frozen items and keep your non frozen items from freezing.
Here is an example of what I have:
They can be found for relatively cheap on craigslist.
That what I was thinking about, but I needed proof its possible, thanks.