manufactured homes
My house is a manufactured and a good sense home so it has pretty good insulation. The electric panel actually has the rvalues of all the wall, ceiling, and floors.
They also put builder grade Alpine windows in here during the rehab and they have a lifetime warranty and keep the place quiet and warm. Cei!ing is r38, floor r33, walls r21, windows were u35 and I'd think new ones are better.
The newer mobile/manufactured homes are so much nicer then the older ones, but they still use thin cheap drywall and components compared to a stick built house.
Very happy with how much house I got for the money I could afford, and I can upgrade things as extra money shows up like I've been doing with my tax refunds.