What's underneath the refrigerator? You might be able to just take that out if it's a drawer and a Samsung 18CF French door unit will go in there perfectly. They can be bought for ~$1000-1100 so probably not that much difference and those are so efficient that they will probably not use much more energy than a 12-14CF unit.......this will likely come back to you when you sell.
Paul & Jean
2001 Alpine 36FDDS (74291) - 1600W Solar, 10,752 Wh (420Ah @24V) LiFePO4
2014 Jeep Wrangler Unlimited Rubicon
2006 Alpenlite 32RL - Sold