Something to consider. Although we don't use the term "return on investment" since that normally applies to passive investing, not active trading (since the $$ is just a tool to be used by our traders to generate earnings).
If you can get 10% returns on your money (pretty easily doable, right?), and then use additional capital, perhaps RegT like 6 to 1, then would you not be generating a pretty good amount of $$ from your investment? Allow for "draw downs" (I hate that term, I just say "losses" - it happens to the best of us)...so, take that 60% and divide it in half, and end up with 30% "returns." But, of course if you're making 6 figures with a $20K start up amount, that might be even better (take work, obviously).
My brother, who handles the family trading LLC (much better him than me, LOL), expects to return approximately 36% on our capital invested (and has), again, using RegT margin of course.
FWIW,
Don