dealing with contractors

[Mike M.]

Looking for advice on how to deal with my handyman/contractor. He is good at bringing me inside info on deals in my market. He is doing this in hopes that I will have him do the rehabs. Problem has been the quality of the work has been below par and he doesn't seem to want to be bound by any timeframes on completion of work, especially smaller jobs. He's always prioritizing his other workload. What is an effective way to straighten out this relationship without blowing it up?