Full articles with subscription and single payment?

Hello,

I'm looking for a possibility to hide some contens of an article which can be provided for payment (preview or introduction is free for charge, full article or download option is liable to pay costs).

Following payment options should be selectable:

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Single payment
--> without registration/ login, the paid article is available for a given length of time (3 days for example).

Subscription/ membership/ registered user
--> registered membership with costs, the user can read or download every article.

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These payments should be available:
- Clickandbuy
- Paypal
- instant transfer/ ebanking (payment-network.com for example)
- credit card
- telephone bill or sms (infin.de for example)

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I use FLEXIcontent and I would use FLEXIaccess as Access control.

Has someone a suggestion of how to implement it?
Could it be realised with FLEXIaccess and the component AEC ( www.valanx.org ) with single payment and without registration?

Greetings from Germany and thank for your help