The problem with most marketing books is they show you how they did it themselves, but not everyone can do it that way. It all comes down to finding your own methods.
I read every book I possibly could on writing articles and I knew everything I possibly could, except the methods they were showing didn't really work for me, so I came up with my own ways.
I think alot of it really comes down to just doing it. The old saying "It's better to have tried and failed then to have never tried at all, works well here.
There are thousands of people now talking about mini sites, but if you want to cut the fluff, just try one. I also recommend you read Phil Wiley's book at http://www.minisiteprofits.com
This books shows you step by step HOW to make profitable mini sites.
I have three or four articles on mini sites that would really help you. Just email me and I will send them over ASAP.
As it seems you also need help with web site design, Phil's book also comes with a great book on web site design as a bonus.
I've used mp3's to send most of my audio messages and it works well. Every man and his dog has an mp3 player or mp3's. I talk a bit about this in my book.
If your looking for cheap hosting for mini sites, you can't go past http://www.successfulhosting.com
or if you are after something a little more substantial in regards to features, there's also http://www.host4profit.com
which it seems everyone is using for backend sales through their affiliate program, or http://www.thirdspherehosting.com
which is along the same lines.
If your looking for a good guide on merchant accounts look at http://www.3rdpartyprocessors.com
That site is also a good example of a profitable mini affiliate site.
I hope some of these answers have helped.
Become A Super Affiliate On A Budget