I would ask the owner for the age of the roof, age of utilities (water heater, boiler/oil tank), and ask if/when the most recent upgrades were made to the property.Of course, take the responses with a grain of salt.

Oil tank removal and remediation should be the seller's responsibility, not yours, UNLESS you're a very experienced investor getting a tremendous deal sold strictly "as is" where you've waived all your inspection rights.The worst case could be significant soil contamination requiring thousands of dollars in remediation, followed by soil and ground water tests by the state of NJ.

Not sure if watering helps or hurts, but your tenants are not going to water.Is everything separately metered?   

I then but a Tiny Home on it and set up my PV system and water catchment and lived there off the grid for 4 years.

The things that draw power are water heaters, and appliance.

Sorry, but I need to tell one more short story.I have a 24-unit apartment building and I had one tenant who had moisture on his windows every day where it looked like he sprayed the window with water from the inside.

Some things you can negotiate such as you wanted to put in a new water heater on the day they have a birthday party planned. 

Neither party really has the ability to fully control the agenda so both are going to need to accept some significant compromise positions, and where that will fall is at this point just a pure guessing game.

Built into televisions, laptops, Alexa, Google and Apple devices, not to mention a slew of "spy" cameras designed to look like ordinary household items (water bottles, phone chargers, clocks, smoke detectors, shower heads, and even teddy bears).

The water heater had a little corrosion, which I saw (and frankly means it needs to be replaced) and he said one previous inspector noticed a little condensation in the electric panel.