The "perfect" affiliate / digital product site setup...

It depends how you are set up I suppose. I understand not wanting to pay for sales you brought yourself and Paypal fees are lower than Clickbank's.
You could certainly set up a separate page for yourself and send your own traffic to it. You'd just need to duplicate the page and change the buy button and Clickbank disclaimer.

If you are using Wordpress there is a plugin for duplicating pages easily (just search for 'Duplicate post').

If you are selling to the EU, you'll also want to make sure you're complying with the daft new VAT rules for now. Clickbank take care of that for you so it may be worth paying the slight extra for that. Another alternative is Dealguardian or Gumroad, which also handle VAT for us.
For an inexpensive product it may not be worth worrying about the extra fee but if it does bother you then do it separately. I run most of my products through JVZoo which pays into my Paypal account anyway and gets my product exposure. Of course there's nothing stopping you from listing your product on multiple platforms to maximise your exposure.

Hope that's of some help.

All the best,
David

If your Clickbank affiliates find out that you also have a Paypal button on your site,
(therefore the customer has another option to pay besides via Clickbank, and possibly bypass the affiliates commission), then your affiliates may not be very happy and you may lose them.

Most vendors when setting up their product on Clickbank use a pitch page (main product page) for their product. This is where the affiliates will drive traffic to as well.
You should not place a regular Paypal button on that page, or anywhere near that page.

Note that clickbank does offer a Paypal link payment option which bypasses their order page
and takes the customer directly to Paypal, however I've never used it.

I'd add Bitcoin payments too (much cheaper, zero fraud, zero chargebacks)

The squeeze page is good for you to use. Its also a good front end to list on clickbank. The idea behind promoting on clickbank is first because of clickbanks striked approval policy you only get good quality products on clickbank. Your payments would go through them and not paypal. The second reason is you want affiliates to send you traffic. By having your landing page on the front end they will help build your list as well.

Thing to do is get your product listed on clickbank which I believe cost around 40 dollars. Then you want to go out and market or send traffic yourself and build your gravity. Building your gravity will put you on the front page resulting in lot and lots of affiliates promoting for you.

We affiliates are lazy so be sure to include a good resource page on your website for affiliates.

I would use the same payment processor for your own sales and those of your affiliates. By putting your own sales through CB you improve the popularity and numbers around your CB product that affiliates use when deciding whether or not to promote your product. So yes, while you pay higher fees, you boost the popularity of your CB product on the network which will attract more affiliates (or at least help you convert more affiliates that you approach about promoting)

Jeff