I am in the middle of spraying my first cabinet. No where near an expert but I found 1 litre of primer was enough to do a heavy fill coat at 4:1 thinners and a second prime at 2:1. For the top coat I bought a litre and mixed it 1:1 which was heaps to do several coats inside and out. The biggest problem for me was how much to mix at a time. My gun holds 500ml which was heaps to do a coat but I had some left over after getting to the end so I kept spraying back at the start til it was empty not wanting to waste paint.  I think this was the cause of some minor shrinkage issues which I am addressing now. My advice I think would be thin coats and obey the recoat times? Good luck with your attempt.