Maybe.
I'm going to try to do the same thing with my roof-mounted HVAC. My HVAC is a 10-ton unit (yes, 10-tons o' cooling!
). The compressor in the engine compartment is huge! (I have a transit bus, not a skoolie, but oh, well....)
I'm going to try and plumb in one or two 1- or 2-ton compressors that run off of DC through check valves. I'm hoping the TxVs (yep, 2 of 'em) don't let too much refrigerant through in their fully-closed position so the smaller compressors can build up the required pressure....
For your situation you'll need to find out if your TxV is mechanical or electronic. Mechanical is what you want - electronic, well, that complicates the issue....
Best person to talk to in these parts is cadillackid....