Typically there isn't anything in between the city water inlet and your hot water heater/appliances so you very well could install your new hose closer to the appliances/hot water heater,
If you do choose to do this, I also recommend that you also install a water pressure regulator like # A01-1120VP. This is meant primarily to protect your plumbing system from potentially damaging water pressure.
I have attached an FAQ about RV water systems, as well as a diagram for you to check out as well. view full answer...