When the contractor went over to repair it he said the water came down like a waterfall.

For example, if the total deal came to 100k, and they put down 30k, they would have a 30% equity in the deal, but you could sweeten the pot with a waterfall, or net earnings bump by giving them 40-50% of net cashflow in the term sheet.If your letting someone come in and give 30% of a deal cash, then giving them 50% of equity (they are already winning by doing that), and 100% of cashflow till their capital as been redeemed, with likely a clawback clause, while you PM for free.

If so use the waterfall strategy...

I think the best thing for you to do here is calm down a bit and then have good CLEAR communication with everyone involved, listen and make sure you are getting all the info you need to make good decisions. 

My lawyer said "calm down, and have a beer"...

@David Calme @Brian Eastman may not be able to recommend himself because of BP's self-promotion rules, but I can recommend him.

I think it would be beneficial for you to create a waterfall based on performance. 

Stay calm and chalk this up to a hard lesson learned. 

I would investigate a waterfall structure if the splits start off overwhelmingly in favor of your investors to help you participate in the upside of an excellent investment.Best of luck!

As a sponsor, you get the option to invest in another class of shares (class B) which will have slightly different rights but depending on your waterfall may yield a better IRR and equity multiplier.