Insulation help for my garage with pics

I saw the foam insulation in a house they are building up the road from me and thought man that would be great. When I asked how much to do his house and he told me $13,000 to spray his house it changed my mind quick. It looked like the Great Stuff that you get in a can to spray around windows and doors. Could buy lots of cans for that amount of money. I will keep watching to help me decide what to do in mine,Joe