It blows quickbooks out of the water with ease of use and I can do the class tracking that the basic $20 a month quickbooks was lacking.There's a phone app also, I just added it to my phone, so I'm not sure how much I will use it yet other than for reference as opposed to opening the website for details. 

Its extremely important when running tighter margins like what you're talking about to focus on age of HVAC, water heater, appliances, roof, etc.

The hardship in my case stemmed from the fact the parcel size required a storm water management system that would cost the same to implement if I built 7 homes or 30.

I assume it has sewer/septic, water and electric and they 2 tiny homes are plumbed/wired?

In that scenario (right now unlikely for the next few years) you may get under water if you didn’t account for it.I never found a bank that would do fix rate for more than 5 years.

Given this is where my major operating expenses fell (beyond taxes and insurance), keeping this cost lower, by average, helps my cash flow.I invest in older neighborhoods, so the 2-4 unit properties, typically have single water meter, maybe single electric, and many have radiator heat with a single boiler.  

I estimate high of what the bill would be and put it on their lease, I have not had any issues this way and if the water bill goes up, I will increase on the next lease. 

That certificate would show open taxes, water, housing violations, citations, condemnations, receiverships, construction liens and other municipal liens.

You might need a 2nd well if you're not on city water. 

An alternative to batteries is a "water battery".