It is a balancing act-- money vs. quality/options/space.

A quality dometic or norcold fridge will run you 750.00 minimum for a dorm size unit.
BUT, will run on anything, and can keep food/milk/medical supplies too.

The little medical unit will cost you 100-200, and only needs a small solar panel
BUT will only hold a little bit.

The chest freezer will hold your medical supplies plus a side of beef for 250.00
BUT, will take more solar.

The deciding point for me; I already HAVE the freezer. If I plug it in to generator/inverter, I can keep it a fridge like temperatures running it a few hours a day.
IF I had an ice machine (I dont) i could make ice to fill it.