Gary, is that the white finished one, or the stainless finished one? I always thought a stainless finish would look good in an Airstream, if you couldn't keep the wood grain. Since y'all are staying put, and not selling, 110 may be a good idea for you. The only concern I would have would be amp draw, if the fridge and a/c both kick on at the same time, it may put you over your 30 amps, and trip a breaker. If you have 50 amp service where you are, maybe you could run a dedicated line from the fridge to the 15 amp outlet on the box.
Also, if you have room to store it, you may want to toss the old fridge in a corner somewhere, for the time when you may want to sell the trailer, you can offer it along with the trailer.
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.