The user would need an account of somesort as otherwise you would have no easy way to maintain there access rights, however with some thought the process can be very easily streamlined you are in effect only asking for a name and email as part of the sales process.

i want to offer users a way to pay for access to a single or more possibly page/post on our site. This does that right?

can it be single or only packs?

Do they need to be a ‘member’ of the site or can do one off purchases?

Looks good!