We did a pretty minimal outdoor kitchen setup with just BGE, sink, and fridge. As others recommended, we went with an indoor-rated 4.4 cu ft fridge w/out freezer compartment, and it worked well for 9 years before needing replacement. It holds a surprising amount of beverages for the size. I think we paid about $400 for a Danby. I got a stainless farmhouse sink (online, not high end at all$200?) with visions of icing down drinks in it, but we really haven't used it that way. Had major issues with our faucet, I guess because of freezing temps, but not sure. Neighbors haven't had issues with their outdoor kitchen's faucet, but we have tried keeping a shop light on underneath to keep it from freezing, to no avail. It never made it through a winter without issues, so we haven't had a working faucet for several years. Therefore the sink is just mainly a leaf catcher. I just take pans inside to wash, but maybe someday we will try a different faucet.
Our cabinet setup was built custom by our contractor and gives us a pull out bin by the BGE for charcoal storage, and another one in the middle for a trash bin. We can store an ash can and all the Egg paraphenalia in the double door cabinet area. The drawers are handy, but I would do three deeper ones if I had it to do over again.
The granite was from a cheapo place and has held up great. It never gets sealed but has had no issues.
Hope you get as much use and enjoyment out of yours as we have ours!