Large Air Conditioner And Compressor Service Biz

[Heng]

Does anyone have any experience in this type of business? Not the home/condo type unit, but the shopping center/hypermart type compressors. Where's the profit engine for this type of business? Stripping and refurbishing (I see a lot of companies have boneyards of these units... sometimes with 100+ units just sitting there)? Kind of curious what exactly is going on in the main operating area of these businesses. On the outside, I can probably match what is needed (land/open storage area) + a couple of mobile cranes.