Common examples include difficult grading, or an irregular lot orientation. 

@Jason Tucker  you need to add in your utilities, common area cleaning, and turnover costs to determine if it makes sense. 

I recommend educating yourself as best you can to avoid some common mistakes.

Rent on a 4 bedroom place may be $5000 monthly ($12,000 in Manhattan); rent it by the bedroom for $1500 per bedroom with access to all common areas.  

If you need additional verification, you can kindly request a government-issued ID, but it’s best to communicate this upfront in your house rules.Happy to connect and share more insights! 

These programs very commonly involve restrictions and conditions on use, refinance, or resale of the property. 

In many places you might be required to get some kind of municipal occupancy inspection.

What kind of property did you end up doing as your next step?

I would recommend for you to list it now and see what kind of leads you will get.

The primary form of diligence we see on the forums is "what do you think of XYZ sponsor and deal" whereas the common form of diligence in the space by institutional investors, large investment groups, family offices, and sophisticated investors involves following the sponsor for years, underwriting the deals, validating rent comps, background checks on the general partners, and a host of other diligence that materially de-risks the investments.