Please please help address this question on syndication deal

[Dharm Mehta]

Hey guys, I have recently received an offer from Syndication of 12 units townhomes. Question is when deal is divided between limited partners($ investors) and General partners (realtor + mgmt company with not single $ invested) Deal 70% Limited partners and 30% for General partners- with 6% preferred on your share of invested dollars which general partners will not collect however, will divide NOI (70/30) with you getting your shared percentage investment (lets say 15%) of 70% on yearly basis; and later on sale of property (70/30) again.

My question, if any expert can please help; is if the General partners are not bringing any dollar to the down payment, is it reasonable for them to charge property management fees of 5% as long as they run the property and is it also ok for the other general partner to collect Realtor fees at the end when property sale occurs taking 3% of sale price. 

Need help to know if this is common practice of collection by General partners (as they are not bringing dollar to the table, but bringing their expertise; taking liability on the remaining of the loan and also finding a deal) ((( but collection through out holding the property by the personally owned management company and at the and sale price collected as realtor fees are steep !!!) 

Please shed some light on this syndication deal, any expert advise would be highly appreciated.