Hi Jennifer,
The great thing about an autoresponder is that you can add content as you go.
It seems you've got enough to start off with anyway, especially if you're mailing out less frequently than in the IM niche.
What I do a lot of times is whenever I mail out a content piece to my list, I'll also go in and add that to the end of my prospect follow-up autoresponder series. (It always helps to have a link back to your sales site though if this is just a prospect list)
Pretty soon, your follow up series has grown to months or even a years worth of content that goes out automatically.
So all you really need is the initial few pieces of content and then just add the rest as you go.
Richard