I am sitting on the airport & have some free time so I'll update about this journey!
It has been really brilliant so far - I am close to doing 1M-2M$ every month now in revenues & half of which is pure profits (even after operational costs).
I am doing a mix of PL, FBA & RA - Sometimes I do buy stocks for generic products & try getting lisences to buy different type of products. It has been so great so far! With PL I am going towards very high competitive keywords even since I was able to get my hands on small or less competition.
I also figured out a hack through which I am able to build sales velocity by which I will be able to dominate a lot of niches on Amazon. Really excited to work on it! I partnered up with crazy people to make out of Amazon combining the skills..