Opinions needed....

Your math is right, but I think you are too aggressive with your unit size.
With 700+ series' per year, you will have consecutive deep chases.
For 6 game chase, I would need a minimum 300 unit bankroll.

Without real data it is impossible to do.  I think the math is right except for the 3rd tier of a 3 tier chase there were 32 losses and 85 wins so 117 times a person would have to lay 500 versus 1 with a 6 tier chase.

last year
tier 1 461-304
tier 2 187-117
tier 3 85-32
tier 1 profits 250
tier 2 profits 1437
tier 3 profits 11562

I am not saying this is right but I based it all off of a max lay of 500 dollars.  Hard to believe anyone would play the 6 game chase for less than 3 dollars per unit.  Just an opinion and trying to establish a risk value.