Aluminum vs. Wood, Foam vs. Batting, Luan vs. Composite

My wood trailer with a rubber roof and aluminum siding has been living outside, uncovered for it's entire 11 years. Sometimes it's buried under 3 or 4 feet of snow. Sometimes it just bakes in the sun day after day. Zero leak problems. A little maintenance and upkeep goes a long ways, even on a cheap model renowned for leaks (like mine).