@Patrick Q.I've used Erik Zerrenner from Premier Home and Environmental Inspections services and would highly recommend.

The reason is that there is uncertainty and cost involved in taking land and building on it, mainly permits, utilities, and potential soil/ environmental obstacles, and over course time which = money.

It would be illegal and get flagged as unauthorized deleading (UD) and you would NEVER be able to get a lead cert, only a letter of environmental protection which states you performed UD, got caught, then had to pay a licensed deleader to come in and fix it.

Well, depends, if you have a 3rd party billing system that does collections, probably greater odds.On your plan to roll the water into rent - You realize that the good guy that consciously avoids wasting water pays exactly the same as the guy that does his friend's laundry in his apartment and basically runs a car wash using your water?

-IRS liens (IRS may buy the property within 120 days after sale at the price paid at foreclosure sale)-Code Enforcement Liens, Environmental Liens, and Utility Liens-Child Support LiensThese are the liens not included when the seller goes to pay for title insurance, most liens will be cleared except these.

I saw new businesses a coffee & pastry cafe, a bridal bar, and a Environmental Learning Center.

Spotted owl and other environmental issue closed up vast amounts of timber land to the markets. 

At the rate it was crumbling, it seemed that I may well be able to dig through all 10 inches the concrete with my hand, all the way into the basement in about 10 minutes with only my bare hand.Is the cause of this deterioration something due to the original concrete mix 100 years ago or is it some sort of environmental issue, like water.  

Luckily, the renovations fell short of the 50% threshold and were approved by the Environmental Protection Board.

First stop, call your local health department or whomever oversees environmental permitting.