Someone who paid $200,000 for a property 10 years ago, that is worth $600,000 today, might be perfectly content with $150 per night from now own.

There is no perfect software out there.

It's about half a square mile of pipes, electrical work, sensors, chemical reaction vessels and towers, storage tanks, etc. 

What you are proposing makes perfect sense thus it's too complicated for the government and could interfere with your next rent payment. 

If I want to add another one do I start by filing a permit for another septic tank with the city?

In many places, giving proper notice that you're not renewing the lease is perfectly acceptable, but specifics vary by location.Another option to consider is "cash for keys," where you offer the tenant a financial incentive to leave early.

No house is perfect and some of those are easy fixes, others are more involved. 

GDrive works perfect.

Though we’re viewed as oddities, it’s been a competitive advantage that’s worked for us almost perfectly since 2010.

The goal of research is not perfection, rather to ensure mistakes are small.