If you do put significant leverage on all of your investments, eventually your balance sheet is going to reach a point where it may be challenging to get a loan if your debt:equity level is skewed.  

BUT in five years that only brings me to a little under half my goal and taps out my 'Investment savings' (assuming we stay at a steady income level).  I

Here is an example for a part of Cleveland using block group The 2nd image shows the vacancy rate at the neighborhood level. I

Another thing that you could do is call the local apartments in the area and ask what there occupancy level is.

Find your own comfort level. I

Plus, comparing to what properties in that neighborhood have sold for, it's not really far off from what I think the house could actually sell for.I think the rent on the property is most likely at its max level. I

I would, however, hire a lawyer if there are other investors besides myself because the conflict at the managerial level is something that should be addressed and prevented ahead of time.

DC- Condo is good, Single family w/ lower level is going to be best option (house hacking opportunity).  

Zillow and other sites are algorithm-based programs, and although many cherish this data-driven overview, real estate on a local level is always a person-based business. 

.-  Also, from a lender's perspective, they will want to know what the risks of the project are, what your experience level is, what the alternative exit strategies are, etc.-  For a loan, keep in mind that banks are in the 4-6% interest rate range these days for investment properties, so a lender will be higher than that.