CA - Contractor Contract for unlicensed contractor

[DongHui Patel]

I am looking for 2 things

1) advice on how to deal with a unlicensed contractor. The person I am dealing with seems trustworthy and had done multiple homes in the area (with the same scope of work). He works as the manager for a GC but also does his own conctracting. 

2) Sample contract - and would it even be enforceable? What is the payout schedule ?