Are you sure you want it movable??? If it has to be movable make sure you buy new. I have never had a problem including moving a 50 year old fridge a couple times. However when I move that one I let it sit for at least 24 hours before plugging in. Gave one to the local threshing show and I think they didn't wait that kinda time. The fridge that had been my main one and worked flawlessly was then junk. I think the big problem comes from junk (oil, filings, etc) that normally settle out in the receiver dryer get stirred up when moving, give it time to settle back and good to go. Of course newer refridgeration equipment doesn't have but still need to be careful.
Someone mentioned frost free. I think you can get a upright with that. DON'T DO IT. You will have freezer burned meat, not good.