I would tell them I understood, but there is no way to prove how much each person or family uses, so if you see someone washing there clothes everyday or their cars, or they have guests over using the washing machines then let me know and I will address the issue with them. 

I hope that helps, but I'm not really sure I understood the question.

I unknowingly did a rental that way, rented an apartment to a police officer, and never understood why he never move in.

As I understood things at that time  a landlord could not hold a security deposit to cover unpaid rent;  it was only for damage to property.

I must have called 10 institutions, but did finally find someone who understood my vision and was willing to lend to me the way I needed.

In my opinion, a large majority of the leases in use by property management firms are poorly written, do little to protect that landlords, and are not well understood by the property management companies. 

From what I've read and understood, NYS requires workers comp and other insurance when you "sub" out work for example. 

I was living in NOLA, and while not investing, I at least understood the dynamic.

not that I'm an expert..I think that those people have already chimed in but I've closed only 6 properties in Michigan. ..All included an emd ...To tell you the truth the emd wasn't even my idea...it was requested by my agent with my offer...like it was a normal understood procedure. ..it let's them know that you mean business....On my last offer I put in a large deposit. ..why not..I planned on buying the property anyway..It must have made my offer look more appealing because they accepted it....

Due diligence is much the same until you get to the collateral.Collateral must be understood, if you're thinking of mortgages, your RE knowledge needs to be on par with a real estate broker, you need to know where to look up something you don't know, but know it well enough that you can spot collateral issues, past, current and future.