This is a purely subjective view. If you're selling that kind of service to the type of people who can afford it, you're going to want to present some level of "perceived luxury". I'm a huge fan of the Bo105 as a pilot, but I can't think of any light helicopter that would come across worse to the average Joe Public. Most are pretty battered; all are vibratory and slow.
I suspect others will be along quickly to comment on running costs compared to a Longranger and the like. Possibly you're attracted by the large cargo area, but there must be other options (cargo pods) to allow you to do the job cheaper and more comfortably with a 206 or 350.