Agree, that is not so great in the scheme of things. You can get this kind of RoI from fund investing or simply picking high-performing stocks ideally over a longer period of time, rather than actively day or swing trading, which is also when taxes come in of course.
Staking this much time and money for a 16% pre-tax RoI, given the risks involved, sounds like a very very risky experiment to me.
Thanks for sharing!