look for the steel sheds on the free section of Craigslist. I see a few that people are getting rid of in the Denver metro area. If you are patient, you could get the materials for the price of picking them up and maybe even demoing the sheds. They tend to not last the hailstorms either, so you can look after one rolls thru.

https://denver.craigslist.org/zip/d/...110350973.html