A/C Question? After Market System

I did an after-market 22,220 BTU under dash unit for $475 From coldmaster.. that included the under-dash evaporator the compressor the condenser the dryer all the hoses clamps under-dash bracket and wiring harness. The only thing I had to provide was the bracket for the compressor and two $5 cans of 134 freon... I went to Harbor Freight and bought a vacuum pump and the gauges,but those can be both rented for free at the local AutoZone...