Shopping cart for selling offline services...

I am creating a system where I will be emailing 25 potential clients per week for Google Places optimization services.

This will be an email with a link to a short video reviewing their current Google Places position, and how I can get them to the first page and get them more customers.

I want to be able to direct them to a page on my website where they can see more benefits of google places and buy the services right on my site.

What cart software do you suggest using that is the most automated way of getting them signed up, get their business information to me, and enroll them in the monthly recurring fee?

I plan on charging an up front fee, and a monthly fee to maintain their top listing and keep getting more citations, reviews, etc.

I would like for their credit card or paypal account to be billed monthly, and if they don't pay, I am notified so that I can make contact with them.

I am looking for a system that is the most automated way of taking care of checkout, invoicing, and recurring billing.

BTW...I am following John Durham with his 90 day challenge, so I plan on getting 25 recurring clients in 90 days to reach my 5k per month residual income.


Thanks guys


Jason