If your tips are so good why is it you only pick 12 winners out of 87?

$500 per month would be ok if you only had to invest 20 hrs per month to achieve it. Under your method a person has to spend about 100 hrs a month. So either they have to give up work, work part-time or work nights.

$100 per week doesn't make up for $500 per week lost by reducing one's work load from full-time to part-time.

Net result
$100/week profit minus
-$500/week lost by giving up full-time work
-$33/week cost

= -$433/week.

Add to that an expectation of 2 bust days per year and it's not looking good.