Guys, I have an idea for a web site based around activity holidays, basically activity holiday providers would index/advertise themselves on one web site devoted to this. I can only think of 2 ways to earn revenue from this and that is by either a set fee for advertising or pay per click through.

I don't have a clue how to organize PPC - can anyone advise me how I would organize this as a means of charging for space on the site ? It seems to me that PPC would be the most attractive way to entice providers to advertise on my site ?

I would be very grateful for all and any suggestions.