You'd need to be negotiating with an actual tradesperson, not someone who is a glorified salesperson / unskilled installer who works for a company that has been acquired in a PE rollup.

The easiest way to find a good tradesman is to ask another tradesman. There is an HVAC person in my local area who will come out and do most jobs (such as, for example, moving an AC) for about $500. A PE rollup firm would quote $10k for such jobs.