- What is a fair structure as far as cash flow split, equity split, acquisition/disposition fees, etc for this type of arrangement?

Just as Sam says above, have a plan for management and disposition, and someone you trust looking at the houses for you. 

You could offer the investors a higher split and charge acquisition and disposition fees, or a lower split plus a preferred return...there are an endless number of combinations but I recommend that you keep it as simple and transparent as possible.

@Bill Johnson, it is the use and disposition of the property you are selling that determine your gain and taxability. 

Meaning if the fund is collecting acquisition fees, disposition fees etc on top of management fees - are you truly getting a preferred return as those are typically major profit centers for the sponsor.

Talk to the family then sign contact once they have legal disposition of it! 

Who will manage the disposition?

One issue that you'll run into is that since the charges were only from a month ago, there is a good possibility that there is no disposition yet.

... they have a person that does aquisitions (buys properties) for them and they have a person that does dispositions (sells properties) for them. since you want your job to be related to real estate, i would ask the person that answers the phone that you want to talk to the aquisitions guy/girl and dispositions guy/girl. 

@Rosa PolioNo matter how many books you read, how many podcasts you listen to or how many videos you watch, they cannot teach you all you need to know to properly negotiate and structure an acquisition and disposition.