good question
Personally I'd go with A, but pay for C myself as a goodwill gesture to my client (because C is hardly a risk)!! :jester:
B may well be the right decision, but PPC requires a decent level of skill at campaign level. If we assume that the PPC guy/girl has solid experience, then fine - maybe go with it. But if the PPC bod is new to the game, then this option would be a waste of money. Also, PPC campaigns don't generally make money until they have matured and been streamlined. A $500 budget would not allow for that to happen.
More than maths is required in my opinion: common sense.