I went with a traditional 10 gallon tank type heater, mainly because the tankless heater cost twice as much... if you look around you might find a bargain on a tankless one somewhere.
One main advantage of a traditional tank style heater in my eyes is that when you install it, the propane is burning outside of the coach so you're not having to plan for ventilation for it. If you go electric you of course won't have that problem.
My bus - Jasmine
As a level 1 burglar, Bilbo got a pony when he accompanied the level 60 dwarves on the Smaug the Dragon raid. Those powerlevelers probably invited him solely so he could trigger fellowship attacks for them.