Central AC cost in Irvington (house, contractor, price)

[new-yorker]

Hello everyone,

Can you recommend reliable central AC company in Westchester that does not charge an arm and a leg?
We recently purchased 3,800 sq. feet house in Irvington with 4 central AC units. We then discovered that one of them leaks. One contractor gave us a price of $7,500 to change the unit and the duct in the utility room. This sounds awefully expensive for one unit only.

Please advise.

Thank you!