I delivered a 45 day written notice of rent increase and notice of new lease back on 5/15. 

I have no idea if such a law exists in Illinois and whether it applies to a 7 unit.The fact that you didn't deliver the $5,000 to him suggests that --- even if you had an oral contract --- it's too late to enforce it.

In announcing plans for the center earlier this year, they described the new operation’s objectives this way: “Modernizes the Army for the future… will integrate the future operational environment, threat and technologies to develop and deliver future force requirements, designing future force organizations, and delivering materiel capabilities.”The Futures Command center is expected to lead innovation for the Army’s top six modernization projects, including improvement to its tactical missile system, combat vehicles and helicopters, defense teams and weapons.Army officials indicated they were seeking a high-tech, creative culture for the location, rather than a traditionally structured Army post.

Yet he still blames them for not delivering his promise?

Letter attempted to be delivered.

Its an "over-deliver" icing on the cake type of thing that breeds huge loyalty!

You also might want to get a 'ghost' number through something like Google voice to use on those signs to make it difficult for code enforcers to deliver a fine. 

None has been delivered so far.

SEED Capital was another company there that didnt deliver.

If you can get your best price from an owner occupant then a month to month lease would be best so you can deliver the house empty to the next buyer.If the house is really a good rental and the lease is favorable then offering it to sale to an investor with an annual lease in place with a good tenant might be best.