Midwest (Cincinnati) furnace advice

[Cappy Jones]

Hey all,

     I am rehabbing a 4 unit apartment with with 550 sq ft apartments. The boiler is shot and the apartments have been stripped of their radiators. I have fairly large hall closets in each unit that can be sacrificed in order to accommodate a furnace with very little duct work needed. Does anyone have any recommendations for a small gas furnace that can handle the job? I'm getting bids of between 35k and 48k for all four units, but I'm seeing furnaces online for 1-2k. With little duct work, I don't understand why the bids are so high. It's going to be more cost effective for me to get the furnaces myself and hire someone to install them but I need some advice on which one to get. Any and all advice would be greatly appreciated.

Thanks,

Cappy