Allow members to download material for a fee

My neighbor is a retired teacher. He wants a WordPress site where he can host presentations on how to be a effective teacher, resolving teaching challenges etc. He has around 50 such PowerPoint presentations. He wants to make them available for new teachers for a price. He knows that new teachers need to be given some material for free so that they are willing to pay for more content. He plans to give N(which can be changed) presentations for free after the user provides his email and getting his IP address, then if the user wants more, he can buy the other presentations.

1. Can Restrict Content or any of the Restrict Content pro versions allow a user to download N presentations for free, then ask the user after the N free downloads to signup, become a member, pay a fee to access more presentations? By tracking the IP address, it would know the user has used by the N free presentations.

2. Can Restrict Content or any of the Restrict Content pro versions be configured so that a user can buy different membership levels like silver, gold, platinum where silver members can get X presentations, gold members can download X + 5 presentations, platinum members can download X + 10 presentations?

Thanks