What happens in recessions is substantially more lawsuits and shark looking for deep pockets. 

that's a good question  there are sharks no doubt that will snake a deal.however as I spent most of my career helping other acquire real estate If I stole their deals I don't think I would get very far.. you can use the NDNC documents.. but unless your in a position to litigate them if they are violated they just are papers .. 

It turns out that there are 2 septic tanks, both from ~1950.

Commercial water heaters are built like a tank.

Recently a coworker of mine purchased a Chevy Colorado with the 2.8L duramax diesel as a realtor, his is a 2wd version and driving around showing houses his fuelly claims he is averaging 27-34 mpg per tank driving it, so been thinking of trading my car in for a used 2016 model to spend the least amount on a depreciating asset. 

What about installing 2 smaller tanks in series?

It has steadily increased which makes me think they are using the outside water more or there is a toilet that needs to be replaced due to some old parts in the tank and might have a slow leak that's just getting worse with age.

Pour some red Gatorade or similar in the tank and return 5min later.

I have full oil tank.

Will the Marshall actually put her out physically, if she carries an oxygen tank?