What is a realistic share for managing a deal?

[Braxton Beyer]

Hello all,

I am wondering what a reasonable fee is for managing a deal for other investors.  I am interested in buying a property to hold and rent out.  So let's say I get a single investor who pays cash for a property.  But I find the property, do all the legwork, manage the entire process. They just write a check and wait for a return.  Once the property is rented, I simply cut two checks each month, one for his/her share and one for me. So what percentage would be reasonable to keep myself?