Seems like a pretty fair recommendation to me.

I was misled when I made my investment, with Dutch frequently stating in public communications that RAD is “like family” and that funds would be returned easily if needed.

  :)   There's so many Gurus pitching this and that without mentioning the risks to them and to the buyers.So glad to hear re your business model being fair to the buyer.   

However, I’m not sure how to accurately determine its value, given the configuration and the fact that it’s not fully rented.My Concerns:Determining Value: How should I calculate the fair market value for this type of property?

I'm fairly new to property management, with 1 duplex, which I have been managing for a few years now.

At this stage of your life, communication skills are most important so be sure to develop those.

I'd recommend communicating more with the PM directly.

They will not communicate, they will not complete the agreed upon work, and they will run you around in circles.

Rent was due by 5th but no communication on late payment and is not responding to my text/emails. 

And 10% is rich, but fair.