HVAC technician reputation?

[Ben Gammon]

Hey There, 

I have a fourplex in Northside, Cincinnati, OH with four mini-split heat pump systems that need work. 

Alex Ray Smith with A.H.R.L.C. Property Mangement & Construction Company LLC quoted me a price of $3K which I think is probably on the lower side. He seems nice but I've never worked with him before and don't know his company or reputation.

Has anyone ever worked with him before? 

Thanks!