I have heard the same but also have never had to test it.

We go down to a 75k value/purchase price for example and some of the same tests that a loan this size may fail for a standard mortgage would not be an issue. 

“It really passed all the sniff tests for me.”

I've tested out some of them as well.

But most clients think that we handle things in 15 minutes when in reality a boundryline agreement with a neighbor may cost, 24 miles, 3 trips at 30 minutes each, a bottle of Makers Mark, playing catch with the neighbors BermesHuskLabraSpaniel and a 15 minute consult with the clients attorney who has the form.

Regional lender know's this would put them outside of passing stress-test markers. 

I would get a water quality test though, included in your home inspection.

Once you have a shortlist, sign up for an account with each one and test them extensively to see how they function.

I gave it a test run using the free option and quickly signed up for a paid subscription.Strong suits? 

He'll need to set the heads, run the lines, hook up the lines, ensure a vacuum, pressure test, and release refrigerant, perhaps even adding some.The contractor knows he's not making a ton of money, and even though his margins aren't there because you're supplying the units, he needs to factor in you calling him and expecting warranty service if something runs afoul.