Full authority to my knowledge means court confirmation is NOT required.

Therefore, you are typically looking for older mortgages going into default.Most court house investors have ties to a title company or understand enough about the system to do themselves.  

This to protect you in court. 

Does your court post this information?

one quick google search of this guy's name " Kevin Lamont Williams" turns up several scam reports.Good to know that my scam alert radar is still functioning properly.

Lots and lots of posts on subject to, so use the search function to read up on this if you're not familiar with these deals.

I'm not a lawyer or tax advisor so my opinion is that I wouldn't want to represent myself in court if I were sued or fight the IRS if they filed a tax lien on me.

Seller allowed us to perform inspection(for information purpose only) and we discovered few issues(window not shutting down, paint peeled off in bathrooms, exhaust fans in both bathrooms not functioning).

One of the big risks that upon have is that if a probate is opened, your ability to control the deal will be reduced, perhaps radically if a court order confirming sale is required.

Has the admin opened the probate, been assigned as Admin by the court/given powers?