Any calculators to analyze returns with a silent/limited partner?

[Vidit S.]

Hi - I have been investing with a partner. We split everything - work, equity, mortgage and downpayment. Few of our friends have asked if they can invest with us without doing the work so as silent partners where we provide the knowledge and do the work. I was wondering if anyone has a spreadsheet, where I can plug in different scenarios with different downpayment and equity division and see the returns for each of us to form some opinions and thoughts around if it would be worth it to get a silent partner and if so, how to best structure a deal.