From what I've heard from friends who build, it's less about having six guys show up and two days later there's a house, it's about what happens when they're bu

From what I've heard from friends who build, it's less about having six guys show up and two days later there's a house, it's about what happens when they're busy and don't show up for three months while the cost of materials goes through the roof and you're stuck renting and/or paying two mortgages. If you can engineer out some of the potential delays that can take a huge amount off the overall cost.