Best I can do is $1000 to change a capacitor that any tom dick or harry could do, and $10,000 to install a mini split that I literally did myself for $1000 in tools and watching 8 hours of youtube.
The industry is largely a scam. There is no reason why you need a brick and mortar fixed business for many HVAC tasks. On one occasion, I knew exactly what was wrong but as a tenant so I could not perform the work myself. I had to deduct $1000 rent from my landlord becaues I had to pay an HVAC guy so I would not break the law literally replacing a plug-and-play blower motor myself. The guy didn't diagnose anything, or need any skill, I just told him exactly what to do and he was in and out in like 5 minutes.