Give the cops a box of donuts.

This saved me roughly $5K in abatement costs (we wore full body suits and respirators and were conscientious about keeping the dust down when boxing and bagging the material). 

I was replacing all the old metal outlet boxes so it was not an issue with moving them all out to compensate for the extra depth.

About $600/mo after taxes, mortgage, insurance, and property management, but I need cash to invest further, hence the question to sell or cash out refi.With current rates and using box homeloans instant quote, I estimate that I can maintain 75%LTV, take out about ~$200K, and basically come out even after rental income.Not an easy decision right?

You can't really put a globe on those old ceramic / porcelain light fixtures that you have in the basement; I just buy an entire fixture from the big box store for less than $10 and put that in instead of the bare bulb fixture.

Leave a note in their box?

But that’s a lot of boxes to check to get there, and as mentioned before, that’s just what is seen - but what is unseen should also be looked at (insurance cost impacts, maintenance costs, useful life, etc).

Or is it a big box retail location that "feels" like a warehouse (think Costco or big furniture stores)?

Box at a mail store nearest to your house. 

You may want to consider incenting buyer agents more to get them interested in the compensation and in working with a FSBO - a box of chocolates if you are a real estate agent.