When building a home on vacant land, selecting a contractor is one of THE most important decisions that you can make. It is always good to get recommendations from people that you trust. You should check with the better business bureau to see if they have any complaints against them. Once you find a potential contractor here are 10 questions & tips to consider before making the final decision. 
Thank you for all this great information on contractors. It makes a lot of sense that you should find and talk to current and past customers to find out about their quality of work. I know that If I was hiring a contractor, I would want to know if they are doing a good job in other places.
My husband and I are currently searching for a general contractor to help us build our dream home. Thank you for suggesting that we should make sure the contractor we hire has all of the needed equipment. I’ll have to do some research and see if I can find the most qualified contractor in my area.
I think talking to past customers is the best way to see how a builder actually works. They were in the same position that you are in now. They’ll be more honest about how the contractor really is than anyone else.