Texas tax lien question

[Jason Smith]

I am looking to purchase a property that was bought by another investor at the tax auction.  I know in Texas the original owner has the right to reclaim the property for up to 2 years by repaying the lien holder what it was purchased for at auction.  I have been told that the previous owners are deceased.  This home will need substantial rehab before I can use it as a rental.  With that my concerns are loosing the property and all of the rehab budget if someone steps up to reclaim.  

Can a family member reclaim a home of a deceased relative that was sold via tax lien?  What would be my exposure financially?