Time to Completion, How long does it take? Options

It really depends on the individual and time invested to really can estimate the time needed to complete Bardon's training in Initiation into Hermetics.

However, I'm curious to know what is your estimate if an average person invested an average of 5 hours a week or an hour/day from monday-friday for the Bardon's system?

yes, its always about walking the path, not completing it.

Any book can be learned by the brain in a year or two, if you spend some time on it you can study it completely. And at the same time you will still be a magickal beginner, you will have made no real progress and understand only logically the techniques. You will have no clue how to actually perform then.
The only thing you would have gained is book knowledge.

Understanding the logics and the theories behind a magickal techniques is just scratching the surface. It must be felt and understood in your whole being. And the level of that type of understanding can grow infinitely. The mind is quick to understand logic, but the soul keeps on understanding more of the truth forever.
Thus the path stretches on forever.