@Matthew Spiegel
Sorry to hear about your situation. Haven't dealt with suing a contractor but have definitely had ones stop mid job and disappear.
I dont think its worth getting a lawyer to sue them either however if you do have their address maybe your closing attorney can type up a threatening letter for free when can be sent to them. It probably wont make much of a difference but it cant hurt either.
In the future you can try doing these two things
1) When contractors go to home depot or any of our suppliers to order material on our account, the suppliers are not allowed to moved forward without calling our office and getting authorization for the order. They will either tell us on the phone what is being purchased or will fax us the invoice for us to approve before allowing the contractor to make the purchase. This way we can be sure the contractor is not putting random material for another job on our account
2) We also make a photo copy of the license of every contractor we deal with so we know where they live. We do this at the beginning and tell them it is to ensure if they leave the job in the middle or do something inappropriate that we know where they live and will have our lawyer deliver a lawsuit. This is not fool proof but it helps set expectations.
Hope that helps