Over time the individual sections shift , develop gaps and leaks and that encourages root growth. 

I know that Zillow and Trulia can do this on an individual basis, but I'm looking more for statistics.

Here is a link: https://www.biggerpockets.com/forums/80/topics/561338-nowthis-is-automation-lead-generation?

We hold the property in our individual names. 

Paying cash may help investors sleep better at night (ignorance being bliss) but losing all that money every month is certainly not wise investing.A wise investor maximises leverage to generate highest returns on cash and holds a reserve in other vehicles to be used for the same security as dead equity while still earning maximum returns.

I was thinking of hiring a VA to handle calls/take over my lead generation.

You should only buy the property based off of the actual gross income, not what it could be generating. 

Experience, however, taught us through the years that if you have teenagers who total cars, even if not their fault (mostly), your umbrella insurance can be dropped rather quickly, and then you're basically paying higher individual property liability insurance rates until you can get it back. 

Before this business he would buy wrecked Yamaha R6 motorcycles and disassemble them in his garage, selling every single piece, part, nut and bolt that wasn't damaged, individually at swap meets and online. 

Jimmy, have you looked at subdividing the property to three individual parcels?