Anyone who can manage the rest of the install can vacuum down and charge their own system. Many local auto parts stores will rent you the pump and the gauges for free with just a deposit (to be sure you bring them back). I only use a pump every few years and to me it is not worth owning one. I would have to store it and with my luck, it would probably not work when I needed it.
I wonder what an ac shop would charge to vacuum and charge up. ?? Someone was putting a Vintage Air unit in their CJ - probably twice the money & work. Any one do anything other than Jeep Air? Not that they aren't a good way to go.