jetflite,
if you are fair dinkum, and it sounds like you are, I have two quick questions for you:
1. Does the owner want kudos/business enhancement OR is he looking for a profitable machine?
2. Is your motivation linked to your opportunity, or are you acting for the owner?
Also, you need to do a quick mission analysis of distances, payload, etc, and client expectations. The distances you are suggesting will probably need more than the machines you are considering. Also I am thinking that an R44 or B206 is not going to impress anyone, and is unlikely to even meet the life insurance requirements of a man worth more than $1 bil. Let alone some of his clientelle.