Subscriptions

Hi,

1 - I am looking for a subscriptions-type Extension that will allow a user to say he would like any product to be sent to him every specific amount of time (Example: 10 items every 2 weeks until the user specifically stops the subscription) and bill them every period separately.

2 - Also looking for an Extension that do the same type of thing but for a set amount of time and bill all at once (Example: 10 items every 2 weeks for 2 months but pay for all 40 items now)

3 - Extension to add a fee if under a certain number of products in a category is ordered
There are 4 categories and there would be a separate fee for under a different amount in each category.
Example: Category 1: under 5 -> $30 fee
Category 2: under 6 -> $40 fee
Category 3: under 7 -> $50 fee
Category 4: always $50 fee

Any suggestions? Must be OC2.0 compatible
Thanks!

I believe this is what recurring profiles does??

I haven't used it myself, but it's already built in to opencart so you might give it a go.