I don't think I'd want to do this to an already built aircraft. It's an EXTENSIVE modification. Even if you did the Flightline all-electric version, you'd still need to add the air inlet and exhaust for the condenser to the bottom of the aircraft in the bay behind the battery (not fun to work there), put in the package tray to the longerons over the battery, plumb the registers and return vents (do you have an overhead console or will you have to add it?) and deal with moving things around that may be in the way. If you use the engine-powered compressor, add the fluid lines running forward to the engine and the engine work needed to add the compressor. Oh, and don't forget the wiring to the panel to control the system.
I'm not knocking A/C and am thoroughly enjoying installing it in my project but it's tough enough adding it into the unfinished airframe. But if I were in your shoes, I'd buy an airplane with A/C already installed or start building one before I'd try to put it in a finished airframe.