The sheets were donated by a friend. The only material cost was dye for the sheets, zip ties, paint and fender washers, all of which totaled just over $100. A lot of money was spent on consumable goods such as: cut off discs, a new grinder, and food for the crew.
I know I got incredibly lucky having the metal given to me; the dome would not have been built without it. However I find that opportunity is where you make it, it doesn't just happen.