Nick,
By developing, what do you specfically mean...Are you putting a basic templete up for a specific category, are you putting specific ads on the site, are you hosting each domain name.
What I am confused with is I understand the difference between Sedo rev's and doing your own content rev's. but how can it be cost effective with 100's of domain names...Do you have to "build & develope" each site, if so what do that take?
THanks for the help