As a comparison, you can rent a PA34-200 in the US for around $125 / hr, a PA34-200T for $170, a PA44-180 for $145. Add to that $35 per hour instruction and of course the JAA examiners fees.
Out of interest are you doing this for the Commercial or some other reason? An ICAO ME rating allows you full privileges in a G registered aircraft without formaility.
Cheers
EA