Hello, Thank you so much for the reply!
Looking at the specs for the 18EC I'm not sure it has a dual fuel water heater?
I also am assuming all the water lines are inside the trailer and the only exposed plumbing, under the trailer, would be the holding tanks? If that is the case I would really only have to worry about the tanks freezing as long as I kept the inside of the trailer above freezing. I suppose RV antifreeze would solve the problem of the tanks freezing. Also I see heated hoses with thermostats available online so that solves the inlet problem.
The building has a septic system and I think I could fairly easily hard plumb the trailers waste dump to that septic system? Then the only issue would be getting used to managing the tanks because as I understand it I could not just leave the black tank open because it would cause it to clog.
Are there any other issues that I should be thinking about?
How well would you expect the appliances, water heater, air conditioner, and so on to hold up?
Again, thank you for your help. I am unfamiliar with all of this and am just trying to think it all through before I jump in. I am very fascinated with these trailers and think it would be a wonderfully simple solution.