Benny, unless I am missing something here, you have a LOT.
100 races winning between 63% and 84% backing 3-5 horses to win on average $10-15 per race.
Using averages SR ave 73.5% win $12.5 ave.
100 races outlay @ $100/ race $10000. but you win 73.5% so you are funding 36.5 races outlay $3650.
You win 73.5 races for an average $12.50. Winnings $918.75. Loss $2731.
This is not going to do it.