Wait... WAT? So many questions.
There are tons of dividend funds and ETFs. Can you point to any that have outperformed the SP500 over a significant amount of time? Your basic strategy seems to be based on the view that dividend stocks can beat SP500 over time. I don't think that is the case, almost certainly not over a full stock market cycle. Shorting SPX is generally a recipe to lose money lol.
How on earth do you lever up 4 to 8x doing what you are doing? So far as I know, one can only invest 200% of ones equity in the U.S. stock market. And, of course, if you so long dividend stock A for $100, and you short SPX for $100, you don't net the two and call it basically a zero investment, that is considered $200 invested. I don't see how 4 to 8x is possible just buying/selling stocks and funds.
Excess cash each day? Dividend yields are very low. Even a 7% yield would be 70,000... FOR THE ENTIRE YEAR. So about $278 each trading day to "hedge out" with. A true pittance. And, since you are on margin, that would be reduced by your short/margin interest as well. Very little excess cash.
I think I just got trolled, but I hope I'm wrong and you can edumacate me on your methods lol!