There is also a possibility to purchase additional acres for building. 

I just put cheap bulbs in and let the tenant put energy efficient ones if they want. 

A roll-away center island might help with storage and give additional working counter space.

I agree with those who hinted that you'd be wasting your money if you put your own money into accelerating your mortgage payoff, when those same dollars should be going towards additional investing.I'll repeat Joe's point: don't help your tenants pay for the properties you already "own"!

. $5-$8/sheet.Gas dryers are more efficient and quicker, from my experience too. 

I would love to help you with the bigger projects only (additions and larger).

I spent quite a few hours researching how to build a website and then bought my domain names, a template, and a host and now I'm finding that I am not as efficient as I had hoped with making changes.

In addition, I would recommend: Listening to the BP Real Estate podcast https://www.biggerpockets.com/podcastListening to the BP money podcast https://www.biggerpockets.com/moneyshowAttend your local REIA meetings to networkStart analyzing deals to get practiceEngage more on the BP forumsAll the best!

The question is whether or not the benefit of getting the third property without any additional cash out of pocket is worth increasing our debt. 

In addition, attend REIA meetings and study.