I made a Google spreadsheet template if anyone wants it.

https://docs.google.com/spreadsheets/d/1ImKoEk72HK7zuOf3FBa2mbcf6qxoe7tmvWgYIWwwnPM/edit?usp=sharing

On the template I put a 5%, 10%, and 20% rake at doubling intervals. Right now the first rake is set at $1000, but you can adjust it to what works for you. I personally have my first rake set at $4000. I'm hoping that happens later this year.

EDIT: After reading JayJuanGee's suggestion I added a way to choose your own multiplier and rake rather than having presets.