He told me many of these homes used an outdated wiring and I may need to rewire the entire house to bring it up to code.

If you are going to take a house that might be out dated and fix it up with some granite, etc, then I would look for upgraded comparable houses that sold.

That is such an old, outdated way of doing business and most investors can't afford to take the discount that these note brokers want.  

The ideas are still good for today but the numbers are out dated, just add a 0 or two to the end of all the numbers depending on where you want to invest."1 Minute to rental property riches" - by our own MikeOH - His book is like shooting a shotgun from the hip, a great no-hype book that gives you the low down on all the facts."

Don't just tell her that she can break the lease, work with her for a specific move-out date. 

The comps are trending towards 75 to 80k, but they have a detached garage and they are very outdated.

If the kitchen is in good condition just outdated then it doesnt really help your cause.Leaking/past life expectancy roofBroken/damaged hvacCracked flooringBroken windowsDamaged appliances.Rusted water heaterAny electrical / additional plumbing issueMoldStuff like that.

(not an outdated site that looks 10+ years old) and that also focuses on getting pages spidered, SEO friendly. 

The pictures show outdated units, which will cost money to rectify.

What I liked about this site is that it has a lot of cell phone numbers instead of outdated landlines.