My realtor got an extension for an additional 5 days.I've had serious problems getting contractors to see the place and give me quotes on short notice.  

You could consider going to the neighboring parcel (assuming the new house is built on it) and selling either the lien so they can foreclose on it or the tax deed, if you foreclose.They may want a bigger yard.I've also seen where those small "useless" lots were actually necessary for utilities, easements, etc and the builder/HOA won't want to see those lost.Jeff Tax Title Services, Inc - The Quiet Title Alternative

I'd get verification of the income they do have; they still need money to live and eat, and may have to pay for part of the rent and utilities.  

From there we get Economic Concepts, Demand, Utility, Scarcity and Transferability Then we have Legal Concepts of real property.

It looks like there won't be much need of repair -- I estimate $5000 at most.All the utilities are split out for the 3 units, except for water, which is $200/quarter.If I estimate 10% Vacancy, 10% repairs and maintenance, 5% capital expenditures, and 10% property management fees (I will mange it myself), I get NOI $11,362, cashflow -$212, CoC return of -3%I believe it's in a good location/neighborhood, one that I wouldn't mind living in, and it's close to Newark Airport.I would really appreciate your thoughts.

@Anthony @Anthony NewboldYou agent is incorrect if you are talking about an inspection with the utilities on.

Expenses are low because tenants pay their own utilities except for water and trash.

The verbal agreement was that my roommate would pay half of rent and utilities.

When they provide  it it’s not really free anyway, they add a bunch of junk fees and More importantly they do a basic search for recorded liens only and don’t cover unrecorded liens like code violations, utilities, etc. 

Bottom line is if you cannot get what you want in DD period then you have to get the seller to give an extension or get out of the deal.You can't let it go past the point of no return and hope it works out in the end.If they just signed a 5 year lease this doesn't make sense.