In the real world you can't ignore the impact the R22 EOL training accidents have on their insurance premiums. My gut feel in the UK would suggest that at least 75% of trashed R22s occur through such training, so that might suggest R22 premiums might be no more than half of what they are if EO training was done to the hover.
I can't help but feel that the added risk to accidents of EO training to the hover is really very low given that (a) real engine failures are very, very rare, and (b) when they do occur most R22s/R44s seem to get heavily damaged anyway. Admittedly one doesn't hear about the real, successful ones - maybe we can get an indication now. Who in the UK has had a real R22/44 engine failure and not damaged the acft?
Maybe someone with some knowledge of the insurance industry could comment too?