Always looking for ways to improve the ARV, and have one upgrade that I'm on the fence about.The gas boiler for this 1920's house is pushing 40 years old.  

Possibly see if you can reroute the gas line from where it currently protrudes from the slab by running it along the wall through the studs or along the interior back of the cabinets.

It's not paying your bills or providing your with gas money (your cash flow does that...more on that in a second)...so if you have a use for that equity, meaning you can leverage it to gain MORE investment properties, then who cares what the fees are?  

Maybe you buy your gas with it every week.

Whose paying  for the gas and electric?

A gas line.

Operating expenses are very low because I use gas dryers (instead of electric), tankless water heaters for hot water, and high efficiency, front load washers to save water.  

Not being smart enough to realize there's toilet paper at every gas station not to mention the 24 hour Walmart and the 5 grocery stores right down the street.

People don't go to the grocery store or gas station and expect to get food and groceries for free because they're sick. 

The only constraint will be how far away it is from me and if I can get gas.