Most redeemable state, the lien holder has no right to the property except TX.GA has a 20% penalty for the first year instead of interest, additional 10% year after.

You'll have to spend time making sure property notice was given to subordinate lien holders. 

At minimum, subsection (c) of this rule requires an advertisement placed by a license holder must "clearly and conspicuously contain the name of the broker, either a business entity or an individual."

How does the license holder disclosure work since I will be the end buyer.

Suppose, if I have to return to my home country due to visa/job issues, how difficult is it to manage the property from outside the country?

If the numbers work, and the deal is structured well (No kickbacks, payments outside of the HUD, excessive funds to junior lien holders, etc.) they would approve it.

In essence you become the master lease holder.

Credit was too easy to get and adjustable rate mortgages which adjusted higher than the mortgage holders could afford, caused people to start defaulting on their mortgages.  

The building will be held in trust by the bond holders ($1000 shares so many bond holders).

Is it true that you can list the property in the legal section of the newspaper for a few weeks giving all lien holders time to respond, and if they fail to respond, that will quiet the title?