The owner, who lives in the ADU, falsely claims residency in the main house, which is illegally rented.

It seems Zillow had an issue with people falsely entering erroneous data.As for the answer to your second question sir, even though I own it I'd like for the data on it to be accurately displayed.

Also, people like you & I can just post crap (hence wikipedia - a terrible source for facts) and is more likely false information.That, or how would you know where to start?

Now, keep in mind my rental is only 2 hour drive but as long as you have local resources on speed dial and solid housekeeping staff you should be fine not needing full service PM similar to what @Paige Kelsey also mentioned.  35% is absurd, especially on an investment model that already has a 50% or higher Op Ex Ratio usually going with it.  18% is not bad but I would be cautious as to exactly what level of service you are going to get there. 

Absurd. 

It is kind of difficult to make a plan if it rests on false assumptions.

In this blog, we'll explore the potential downsides and risks when a property gets overvalued.The illusion of Value: Appraisers "showing love" can create an illusion of inflated value, luring investors into a false sense of security.

I don't need the rent for the DTI calculation but not sure how I would do this without providing false information to a bank. 

Just absurd. 

I'm not in the place to move right now, and the house is more expensive than I'm ready for (I wouldn't have 20% to put down) as a residential purchase.What I want to know is this: If I purchase the house and convert it into a duplex (it originally was one and my grandparents made it one house, so this wouldn't be an absurd task), is it likely that rent would cover the mortgage?