If I may suggest...
Instead of spending your valuable time reading, experimenting, testing, spending (and risking)...
... Why not just model off a system that is already a proven winner?
Why not have the system in front of you, watch it make money for you, and then model off it so you can work with 100% certainty?
This is what my Done For You Sales Funnel service is all about. It's more than just a 'service' for lazy people. It's a business model you can own and model off so you'll know exactly what to do in the future.
Look at it this way: If you created your own site, your own product and send traffic to it in the hopes of selling something but didn't, you'd have to keep tweaking and adjusting your site until it made money for you.
If however you had a finished system setup on your server, you sent traffic to it and saw'notification on an instant payment' hitting your Inbox, you'll start to inspect it and understand how it works.
It's like being a detective and working backwards to trace your steps rather than looking for clues and going in all directions trying to find an answer.
Instead the answer is already here and you just need to trace it back!