I was thinking of a spray foam insulation.  

Removing the drywall and then spraying bleach or a mold killer on everything is not hard.

The painters used a spray gun.I just placed the new rock over the old rock on the fireplace and it just changes the look completely.When it comes to the numbers I think your calculations are off a little. 6% on 175K is like 10.5K + $2500 in closing

The landlord had it sprayed around 17 Feb and there has been very little effect. 

John, I am not too familiar with the official definition of war zones, I have always assumed an area is a war zone if:(1) As I drive through it, all the passengers in the car have a sudden desire to lock their doors...(2) You wish you have a weapon with you, if not, one of those "club wheel locks" you had back in the 80s might help a little...the female passengers finger through their purse to check for their mace or pepper spray.(3) You pray your car doesn't break down, you would never stop to fill your gas tank even if your dash says your gas tank is empty.(4) You check how many bars your cell phone has, you pre-dialed "911" just stop short of pressing "CALL".If some of the above are true I call it a war zone.

At a certain point, I started noticing certain "road markings" - spray-painted designations that would appear on the streets, or on paved-surfaces in the immediate area.

Above all I dont want to be caught with my hand in the cookie jar.

I hired a landscaper to come cut down a tree in the yard and while they were there, I asked that they pull all the overgrown weeds and spray weed killer.

I just wanted some more feedback on this so as always I go to the trusted Bigger Pockets network.Any input would be greatly appreciated.Thanks,Jarred

It's a shame you waited until after the floors as you could have sprayed.