As far as transporting the foam, purchases 2 sheets of the cheapest plywood you can find along with the foam and sandwich the foam between the plywood and strap it to the roof using tie downs.....works like a charm and no damaged foam. Reuse the plywood every time you need foam sheets. Also, there is a mausoleum that Raven Manor did that I am going to duplicate next year that does not involve foam but is easy to break down. Take a look!
Raven Manor : Projects : Mausoleum