What percentage should I take for Syndication?

[Salomon W.]

So, I am an investor in NY (not in the city) and just until now I did some single family investments and some multi family investments. I am now interested in investing with money from friends and family and was wondering what is an acceptable cut to find the deal, find mortage funds, find the management company and make sure that everything runs smooth with the property and rental. We are talking about a hi cash on cash return for a home designated for student housing, probably 20% or more. What is an acceptable syndication percentage rate that I can take for myself for doing all that work and always be responsible for anything that happens to the property? 

Any input is appreciated. No input is superfluous. 

Thank you in advance. 

Salomon