Include some charts and photos of the markets you are interested in.  

I have found that one of the unit in my duplex has tenants that frequently leave the outside door unlocked. 

Photos on MLS.Make sure you can upload at least a dozen photos.

(Guests will probably never go out there but it looks good in photos.)Except in general terms I would disregard any specific booking information from the current owner.

@Ben Gabin have them take before and after photos and provide photos.

Given that it sounds like you already work hard and have a nice family (profile photo), I would suggest allocating any additional precious income-producing time to something where you have unique skills, a competitive advantage and can maximize your hourly pay rate. 

It was on the MLS for an extended period of time and the agent did a terrible job with the photos, property description, and showing the true potential behind this ugly 1950s home that just needed some lipstick.

These days, we'd want a photo of their drivers license as well.Way back when, I used to show properties in person.

I would hope the agent showed the investors some photo's of previous houses, but I'm guessing that didn't happen. 

Will update with some great photos to detail the before and after of this project.