am I secured in hiring a lincens contractor giving him 1/2 down to start the job plumbing work ?
As long as the contractor is genuine, you are guaranteed in hiring him to start the job. Also, make sure that you have the agreement in written form and you should also have a receipt for the down payment.
yes the rest when hes done and your happy with his work
no its 10 percent of the entire job costs or no more than 1000 dlls to start any job in the state of California i just retook my test so i know this = /