CapEx and vacancy will consume some of that over time.

They charge 5% of monthly revenue (rent minus vacancy) as their management fee which I find to be extremely competitive with what others offer.  

Of course it varies based on the size of the building and what vacancy factor, mgmt expenses and repair/capex expenses you are using too.

Maybe start a staging or small furniture rental company with the assets.There's many exit strategies, and maybe you never have any issues, but if you do it's better to be able to pivot quickly and with minimal vacancy.

Standard Cash Flow During the Year Monthly Estimate Yearly Estimate Notes   Rental Income $1,600.00 $17,600.00 The yearly rental total projects one month of vacancy.

As for other online resources, www.neighborhoodscout.com offers "Investor-grade insights for every location" (i.e. market data, price appreciation, rental rates, vacancy rates, etc).  

Vacancies have been climbing, despite the university's attempts to increase enrollment.

I would look for apartments in the area and call the management companies to ask for vacancies and current rents. this would give you the best apartment pricing in the area.

I gave my $300,000 move-in ready beautiful vacant home to this large well known local co in Oct 2016.( Ive owned and self-managed another very similar rental in the same subdivision-- since 1998--and it has never had one day of vacancy in 16 years-- rented at $1860.)This professional pm co put all utilities in their name on my new property and turned the hot water heater ON and the Water ON ( even tho the main water cutoff valve is easily accessible in the coat closet beside the garage, the entire 3 months they 'managed it').They let the property sit VACANT OCT-NOVand on their "routine inspection on Dec 1, to make sure hobos had not moved in" they SAW the water heater in the garage was spewing (at full blast) A 20' stream/ fountain of HOT WATERand that the entire finished closed garage was covered COVERED !!

Using BP Calculators, I run the expenses with 9% vacancy, 7-9% for repairs, 7-9% for Cap Ex, 10-14% for property management.