Another avenue for your research might be to contact one of the sim training outfits. I was very impressed with these guys when I went there with the owner I was working with in the CJ3:

ProFlight West | TRU Simulation + Training | TRU Simulation

They seemed very "in tune" with the owner / operator situation. You might call them and ask to speak with someone in leadership, and present them with your "zero to VLJ" scenario. Ask them what they think and what they recommend for the best "pre-jet" training. If nothing else, they can tell what they've seen that has worked, and what hasn't, as far as clients' backgrounds and getting through their training track.