I've reached out to the Treasurer's Office  in several counties, and I've received essentially the same information across the board, which I thought would be useful to share here.After three years, the lien holder can still apply for a treasurer's deed.

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 

When I volunteered as a mentor after I graduated, the treasurer of the local chapter manages an over $700,000 budget.

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.  

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.

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

I understand buying a property via tax sale or OTC tax deeds wipe out majority of liens if there are any against property. If not, is there ever an expiration date regarding liens? Do lien holders discontinue their li...

Usually an IRS lien and any other encumbrance will be available to you with the treasurer/tax collector of the county. 

They look like they are mostly metal.

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.