Cold Weather RV Trailer Living Prep Tips

In between wives, I bought a 70x15 single wide mobile home.
Was trying to save money and live economically.
1st winter there was mild, no issues.
2nd winter I about went broke paying for propane, running base board heaters, 2 kerosene heaters and closing off the back 1/2 of the home.
Had the shrink wrap on the windows and still had a 1/2" of ice on the inside of them. Heat tape on the water lines, but still froze.
Bought a house shortly after that winter.
Bought a double wide in 2013 thinking I was going to do the snow bird thing, but life got in the way and I wound up with custody of my grand daughter.
Wasn't putting up with another winter in a mobile and bought another house.