Most HDs will not allow a non NSF refrigerator, nor would I recommend using one.
You can pick up a good unit for $1200, they are made to easily clean and built to keep large amounts of food cold.
Pitboss @ Woodpile BBQ Shack
I cook the best brisket north of Dallas. Get over it.
Michigan State Lead-Operation BBQ Relief
BBQ Person of the Year 2013