Parallel Universes....
I too am working on the sink. I thought I'd insert my plan here to see what we might cross-develop.
Getting a functional kitchen is essential to getting the cook on board for some extended trips. My thought was to make the sink fold out from the rear-most cabinet. On the passenger side I reversed the door hinges to make everything swing out. Thus a more open galley.
I'm bench-testing my idea now. I think we have the same SS sink. I bought a plastic faucet set for $25 on eBay. From my RV experience, I know I dont want the faucet to be moving or require set-up. If it all works I'll hunt down some stainless steel ones.
My metal-fab skills are non-existent, so I have a nice piece of teakwood in mind for the 'counter.' The drain is still mostly TBD. Currently when I flop the sink down it aligns with a larger dia pipe that then will flow to the other side of the trailer. From there I have in mind to have a bucket and/or hose.
Will you faucet always remain mounted to the exterior?
You are ahead of me on the refrigerator. Which make/model are you thinking?