I want to sell PPC to white collar professional service businesses (lawyers, accountants, etc.) I already am a website designer marketing to these folks.
I could create a website that sells a listing membership in a web directory sourced by PPC ads, ranging from x to y, per month (could be anything, $20-$2000 lets say), or sell directly to a fewer number of clients and manage each campaign directly.
I'm trying to detail the pros and cons of each and in particular to what degree can I make the shared site method as maintenance free as possible? As folks don't usually buy PPC through a membership system will I wind up having 100x the number of phone calls to vet it for the prospective members or can it be a no brainer through a sales presentation? (Because if they're going to call I'd certainly rather sell $500 over $100 worth of services each month.)
What are your basic thoughts. (with some detail of explanation so I can give them the credence deserved).