What is the #1 tip, when it comes to buying a never-erected or disassembled steel building?  The answer is The Closer The Better!  Why?  Shipping runs about $2.75 per mile, and you are going to use most of at least one flatbed truck.  So, you ultimately will save cash by finding a structure that is close-by. 

A competent erector is key to the successful completion of any metal building or roof construction project. The thousands of buildings that perform satisfactorily attest to that fact.

However, a poorly trained or inexperienced erector--even with the best of intentions--can create a multitude of problems. Based on my analysis of hundreds of post-construction problems, the most common cause proved to be improper erection. This held true for everything from structural collapse to lack of water tightness.

Since the erector's role is so critical to the success or failure of a project, it is vital to find and hire someone who is knowledgeable and experienced in the specific type of metal building or roof erection at hand. Most metal roof manufacturers offer more than one product. Some erectors may have the training and experience to erect one, but not all, of a manufacturer's systems.

Attached is an article by Leon Dazy with useful guidelines for finding a capable erector with a qualified crew. If you have limited experience with metal building and roof systems, consider hiring a qualified metal building consultant to help you evaluate the installer. Some buildings are more complex than others, and a consultant can help verify that the installer's experience is a match to your project's level of complexity.