Knob and tube is very dangerous and is often difficult to insure.  

There may be Styrofoam tubes between the rafters for this reason.  

Wholesaling101 You Tube ChannelKent Clothier – You Tube Memphs Invest channel

I would suggest in addition to some of the other advice here, watching some of the call scripts on you tube - not only do they have some great verbiage - but you can also see the tone and style that they use when calling people - you can even watch wholesalers do live calls and see how they handle rejections and how they lead up to the negotiations.

Namely knob and tube wiring, which is common in the area.Also, the state of Indiana requires an electrical upgrade from 100amp breakers to 200amp if the property has been vacant and the electricity shut off for an extended period of time.Not a whole hell of a lot going on in New Castle these days.  

The googling of success stories and failure commentaries, the hundreds of different ways a deal can go great and also go straight down the tubes.

It is an older property that has about half Knob & Tube wiring which I would replace before renting.

TONS of info on them here on BP and on that "Series of Tubes" called "The Internets."

There is a bunch to learn on this website, You Tube can help you get a bunch to choose.  

Maybe there are major foundation issues, or plumbing, or its still knob and tube and needs a complete re-wiring.