At the end of the project's life the land must be restored to a natural state and the materials must be recycled if possible, eg. stripping out metal, etc. 

There is a common misconception about deleading cost and how it can be done.It varies from situation to situation, it could be as simply as covering hazardous element with some plywood or metal, or it could be some replacement doors/windows and making paint intact.

I generally use cash to invest but the real estate market is very depressed right now and my portfolio is diversified in BTC cryptocurrencies focusing mainly on gold short term trading on top of state metals 

If that is the case, I'd get some new ones, stack them in front of the old ones, and get rebar or similar strong metal poles pounded in to hold them in place.  

Complete roof inspection of flat, shingle, and metal roof.2.

We are working with a property manager who will handle midterm metals at a reasonable rate.Always buy a property that would also be a good long-term rental.

This is what I got from the seller.Remodeling: No remodeling has been done recently but is still in good condition and almost like new: a new 50-year metal roof; new central air and heat; new cabinets, sinks, etc., in the kitchen and baths; new flooring; a new driveway.  

They look like they are mostly metal.

Please just put a metal roof over it.

Shazam me taller Uncle Sam.....