Mechanic Job in Columbus, Ohio

Hello. I have a Dodge Stratus R/T 2.7 I had a mechanic replace my thermostat. The problem I had been having is coolant bubbling out of the resivior. Changing the thermostat made it bubble over faster. He looked in my oil and it had a green tint. He said it's the head gasket. What I need done is the heads removed so I can take then to machine shop. I have purchased the entire head gasket set, head bolts and water pump.I may buy the timing chain too since it has to be removed to replace water pump. I would like for the same mechanic to tear it down and put it back together. I know most people don't like to finish someone else's job. I really need to know price upfront. My last mechanic wanted 600 total for all. I will pay to remove heads. And then finish payment after I get hands back from machine shop and work is done. Thank you.