I replaced that cheap faucet that hugged the back of the sink a couple of months ago with this one from Camping World:
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Cost was around $60.
It was a pita getting my arm in there to change it out (if you don't own a 'plumbers friend' tool...get one), and I had to mess around with the screw on water line coupling a couple of times to get it to not drip . . . but now it works great!
What a big improvement over the original!
Next . . . the kitchen faucet . . . followed by replacing the shower faucet!
One question . . . well, really two questions . . .
Will a faucet from Home Depot or Lowe's work in an RV?
John all plumbing faucets are standard typically 8" centers for kitchen and 4" centers for lavatory. So yes any of the big box stores will have what you need.
Or is there some special measurements or hose requirements for hookup?