Jezza, J3 brings up a valid point....I too would clarify as much as you can just what the other roles entail. When I was in GA, it was basically a 2 pilot operation, and we ran the whole show, phone, bookings, check in, loadsheets, baggage handling and the flying, however, it was a small operation and quite manageable. This company sounds a bit bigger than that, so a 4 day stint in reservations could very well be an option from your bosses point of view.
I think AeroZep is probably onto the biggest hurdle.....and I dont see how he'll manage that, or operating ZK rego aircraft in a commercial op in the USA.