I bought a 30 x 40 metal building kit here locally, it was a bolt together. The main problem I had was the concrete contractor made my building 2" too short on one side so he had to go back and pour a ledge with rebar and the whole thing , I was ready to kill him before it was all over, seems his dopehead son ended up being the one who laid it out.[Should have done it myself]. All in all it went pretty well after that incident and I am enjoying it very much , but as you will here from most guys here "My shop still isn't big enough".