Well for the electrical
hook up, I am no electrician, but most house hold circuits are 120v 15 amp, and this unto says 120 v 6.25 amp, so as lots of room to have it hooked up in a circuit with other appliances, such as your fridge
But if I were hooking it up I would put it on it's own circuit just to make sure it had enough power, this is also assuming you have the correct 220 v 30 amp, coming from the post to your trailer, if you only have 120 V 15 amp to your trailer it would still work but might blow a breaker if you run too many things at once
It's a great idea though, will keep it in mind for my remodel, it gets the water HOT though, lowest setting is 160 degrees, now if they made a propane
version of this I'd be all set!!!