Our used motorhome came to us with an electric\gas water heater..Problem is the electric part is a HOT ROD add on,with an extension cord that has to be plugged in around front of the kitchen cabinet....
I agree with the others. Hot rod enjoys a good reputation, is a great water heater and has been around along time. It has its own thermostat and heats water just as fast as an "electric" water heater. Just run a plug into an area close to the tank and don't spend a bunch of money needlessly. If it's not much trouble to plug into the one you're using now, I wouldn't even do that. Mine is plugged in all the time and I have an on/off switch under the bathroom sink. Off and on quick.