Don, your modular then was set on top of some sort of foundation? Is the basement below grade level?
Yes, we are sitting over a full basement. They dug out a monster hole, and built the basement with reinforced concrete, and the house sits about 2 feet above ground level, except for the west end which is graded down to ground level. There are 6 windows in the basement, and I walled off about 1000 sq ft for a roomy two car garage on the west end. The rest of the basement is just storage, home gym, chest freezer and spare refrigerator, etc, and ductwork to supply warm air from the outdoor wood furnace. The floor is anchored to the foundation with Florida hurricane straps every 3 feet....if we got hit, the house might be wiped out, but the floor and basement area should be a pretty good storm shelter. The dirt that was removed for the foundation was used to grade the yard nicely to supply good drainage during rainy weather.
All told, its been a pretty good setup, with only a few minor problems over the years...far less than the site built home we had up in the city. At some point, I will have to have the roof redone, and new carpeting...if we stay here many more years....it all depends upon how our health holds up.