Contractor info help needed: We're having a small job (appx $1,500) done on our front yard of a concrete step-up & driveway extension. Is it typical for a contractor to ask for half of the cost upfront, the cost of just the materials, and/or more? Its been a while since we've had to hire anyone. � What's the norm? And has anyone had work done by All Star Concrete or A. Lopez Concrete? Thanks!