Buying a house mid Reno with open permits

[John Shortridge]

Hi everyone, I'm looking at a property which was previously owned by an investor who suddenly passed away. His kids are liquidating his properties. This property still has valid permits, which have all passed the rough in/framing inspections. I've contacted one of the subs and  they are fine with just finishing out the contract, but the two others are MIA. 

Anyone dealt with this before? Should I worry about a potential mechanical Lein on the property? Or worse, if I wanted to use a different contractor to finish it out, would I need to pull brand new permits and go thru a rough in inspection again? Thanks for your help.