Opinion on winterability of my rig

A variety of experiences and options offered. Having camped several winter seasons in my ROO, adaptabilty was Job #1. I have continued winter camping in the MH, admittedly only locally but Mid-Atlantic winters can be brutal too, just not as bad as our Northern and Mid-West neighbors. It is and has been a work in progress. Although I have ducted heat and a heated underbelly I rarely use propane heat. I do maintain a small space heater on a 38 degree thermostat in the black/gray tank and water pump area which keeps things 'warmer'. I have wrestled with emptying both tanks overnight and as observed by someone, the more thermal mass the lessor chance of freezing. But dumping each night is no big deal. I often do not detach the fresh water hose as well since it is heated but there really is no reason to keep it attached unless a steady stream of fresh water is absolutely necessary. That is why we have fresh water tanks. I have not insulated much underneath but do have reflectix inserts on every window and vent in the living area as well as plexiglass panels on the screen door. I use an oil filled radiator and one ceramic heater in the living area to balance direct/indirect heat. The coldest I have experienced for an overnight was a low of 25 degrees outside and it was a struggle to keep it toasty inside. I have had several days running where getting to a 40 degree high was a stretch. Of course that is when I scratch my head and ask myself "why"? A warm sweater, blanket, good DVDs and a bottle of Fireball help too!