Here is what I've thought of doing.
Use a regular faucet
. Hook city water to hot and 12v pump to cold, ditch the hand pump. This frees up both hands once the water is on and would supply more water flow.
Fuse per pump requirements.
I have a three way faucet. The faucet is anemic at best to match the tiny sink. I stopped using the on board water system. Most of my water needs are outside where I use large mouth one gallon jugs (old Arizona tea jugs). I keep one in the sink inside for pill taking/teeth brushing.