In Fall, the plan was to build a 2x4 frame on the micro mansion floor to stuff with insulation. I've decided to take some left over pink board and lay it down on the existing plywood floor then top it off with 1/2" plywood. I was able to find the plywood needed at the local ReStore for only $25. With the pink board being left over from another project, this is a better economical choice for the micro mansion and the overall budget!
As soon as the weather reaches above freezing, hopefully by mid-March, the floor will be able to be insulated and installed.