Will it cover a fire due to old wiring or is that an exclusion?

Not mutually exclusive of course, just exponentially more difficult. 

Has anyone had any experience with renting multiple properties to large companies or schools and becoming an 'exclusive' or official partner with that school or company?

The "option" grants the grantor the exclusive right to buy that home for a specific price, over a specific period of time.

Know all the streets, how much properties are trading for, go to all the open houses, research what is going on in the local business market (local newspapers, online forums can help with this).3.

I put the house in the local news paper for 2 weeks before rehab was completed.

Owned a couple of cash flowing properties in Huntsville, AL and now I live and invest exclusively in Kansas City.

I'd talk to Dale Carlton maybe, he is the exclusive listing broker/agent of one of the biggest residential investors in the area so he will likely be able to work with you or point you in the right direction.

I am from NJ, and up there they have an "exclusive realtor contract" which realtors would ask clients to sign.

It's like they want it to be inconvenient so you will use them exclusively but honestly it just makes me want to use it less.