$2.00 PP or SP?

Your problem will be that horses that start at exactly $2.00 will not win exactly 50% of races. Sadly you'll go broke eventually.

You might find this useful

http://en.wikipedia.org/wiki/Martin...lette_system%29

It's possible to get a streak of more than 10 outs with a 50% strike rate.

Best of Luck

Pixie