This lack of responsibility and fairness raises serious doubts about the integrity of the program.Additionally, Kristin Witherspoon has also demonstrated a concerning pattern of wrongful terminations.

I'm a fairly new investor and was looking for some advice on what my next move should be if I want to build up a portfolio of STR's.

to be fair to property providers financial estimates are just that.. you cant count on them to be perfect. 

We have fair landlord-tenant laws, similar to Texas, but still the specific process is different.

Quote from @Cari Sweet:  This sounds like a case for Fair Housing- Familial Status discrimination. 

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?

Looks fairly normal to me.

We had success in summerlin with insurance company paying .. over a 24 month period we had 3 tenants   fair market rent at the time was about 2200 or so non furnished.. we got 4100.00I did not like the turnover so I put it up as furnished rental and got 3500 and its going into its second year with a superb tenant. so seems like a happy medium for us.. 

I know, some will say "we don't do that, we just have it as a service because..." and look if your doing it fair and decent kudos to you for being decent.

Fair PricingThey’re not the cheapest, but they’re honest and transparent about costs.