Are they installing a siding block, mounting block on the house that’s waterproofed so water doesn’t run down the into your breaker box, behind siding and rot the substrate?

Well water.

That means pouring buckets of water down floor drains?

Mortgage, water, HOA, HELOC, etc.But correct, the LLC doesn't offer any legal protection.

In addition if landlord pays water and sewer even with no leaks there were increase in per usage costs from the utility companies that drove up cost per unit.

There are countless ways that you even broaching this subject with them can get you in warm water that can quickly become hot. 

It isn't the real thing and a water-downed version but may help some when searching for properties.

Discovered the magic elixir of Dawn dishwashing soap, vinegar, and water. 

Filter out anyone who isn't qualified (you should have qualification standards for income, credit and references).

You can pull a list of cash buyers in your area from Propstream, Batchleads, or Propelio, you want to make sure to filter the ones who brought within the last 12 months properties of similar size/budget to the ones you're targeting.