Th first Mega-Mini had a 4gal RV gas water heater, and the reason is that the guys building it did not know that most teardrops did not have one so they put one in. Nancy loved it and MM#7 has 6gal gas electric (might as well use park power when ya got it) it will also have an external shower.
Camping for us in the past meant tents and heating water on th three burner Preway stove, time consuming and not a lot of fun for Nancy. Now prep time and clean up take no more than it does at home so we can do fun stuff and so she has a vacation.