Welcome to the forums! You seem to have thought out any arguments, and weighed your options.
Our Overlander had a 120 volt apartment fridge in it when we got it. Basically, as long as you make sure the area around the fridge can get air, and your coach isn't open to the air around it (makes it hard to air condition and ehat with a giant gap in the side), you should have no problem. An apartment sized fridge will draw about 4-5 amps running, and maybe 8-10 starting (momentary for a few seconds).
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.