Scatter the poison bait blocks behind refrigerators, under stoves and in the crawl space of your rental (anywhere kids and pets cannot get to). 

Quickly accessible.

Having shown many tenant occupied properties, it is VERY difficult to gain access. 

You just have to know what you're doing and have the right access to deals and contacts on the ground.

If there is no deal available you are better off paying down debt provided you always have access to capital.

Sometimes, if their lending criteria changes after you've owned the properties for several years, the lender will want to credit your sale proceeds toward loan paydown and effectively not allow you access to as much equity as you want from the sale of one of the two properties.

There was a lot of unused and underutilized space when purchased.

If you're even somewhat active in the purchasing/selling space, I highly recommend you obtain your Real Estate license for the following reasons:- CE credit often overlaps and counts toward both licenses.

@Aaron YangI have access to a million cash and have been having trouble getting a deal finalized

I personally made the mistake of not following up with CRE agents early on, and focused exclusively on the MLS listings which I have access to as a realtor.