Cheap sheet metal for underbody panel work? Cheapest possible plz!

[JackMcCornack]

I use a fair bit of 26 gauge roofing material on my cars, it runs $70..$75 for a 4 x 8 sheet, it's galvanized, it's painted on both sides, and if you park your car on your roof, you can get a 20 year warranty.