Now I've got 3 concerns 1) 10 min out of town might seem like nothing to most but to others that's a long drive to pick up kids from practice or taking kids in to play with friends running to the store ect.

Gallons of Natures Miracle pet odor cleaner (you can get it at pet stores) do a couple round of that.

I started a side business and built a shopify store.

First you gotta find a supplier (I recommend Aliexpress/Dhgate for cheap/quality goods), then find a marketing strategy and create social media profiles and keep posting. 

I will check out the store asap! 

But the parts are down at the store for $30!".

I'm almost overwhelmed with the amount of information here.Sure thing Bryan, and it might be a good idea to start with one BP's books, especially How to Invest in Real Estate: https://www.biggerpockets.com/store/how-to-invest-in-real-estate-ultimate as that will walk you through all the basics in a straight forward path. 

One of the house rules and regulations ezlandlordforms.com gives me the option to choose to put in the lease is: "Charcoal and Gas Barbecue grills may not be used or stored on any patios, porches, and/or landings."

Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum.

The cold incoming water would be stored in the tank and warmed overnight or throughout the day which would decrease the total temperature rise needed.