if you have the time to put into it, what i'd consider doing is

2 1-hour live shows per week

1 solo update

1 update with you and another guy. he can be solo but we should see or at least hear you to verify the connection, although having him interact with you a little makes more sense. after all, content in a site about YOU should include you

maybe a video blog, as well. sort of tell them briefly what's new with you, about finding models and what the last guy was like to shoot with.

this would mean you only have 2 days a week with nothing new happening and would also help your site grow quickly. now, if you also archive your live shows, adding last week's or the week before's on the 2 days where you have no updates or shows, you will have something new for your members 7 days a week.

if you add an actual blog, people can leave comments without having an actual forum. i don't think you'll find the average member sends emails - the ones who really want to talk with you will be there for the live shows.