Using membership to sell subscription for software services and related content

Hi,
I run a IT Services company and some of these services are paid for by a recurring monthly payment / subscription. I had hoped to use MarketPress to manage this but can't and have seen several people say use membership. I have a couple of questions:

1) can membership be used in this way? The services do have specific content (guides etc) so would be useful to protect some of that.

2) Is it possible to restrict products visible in MarketPlace according to membership level?

3) Is it possible for a user to have multiple subscriptions so they can have a subscription at a given level to the Backup Service and another to a Managed Anti- Virus service ?

Thanks
Jon