If you use it without compiling debt and pay it off, in the long run this can help you a ton with your credit score and improve your ability to get a loan.  

Even though info is free like you said, they do a good job in compiling info and auction dates/format links to help keep you organized.  

Compiling current data is simple in context, but you will need an honest and straight forward seller to get this done correctly.

However, the industry standard for compiled lists is 90-95% deliverability.

At least, not in So Cal courts.You might do well to oartner up with someone who has the time a day schedule who can access files or pay a pro researcher to compile data for you.

This doesn't mean fulfill it, but just respond.Depending on the request and how much is required to compile it, they are allowed to charge fees.

You can also buy lists from companies like list source and there are some REI software companies that have a cash buyer search feature.Some of best ways to find motivated sellers is to purchase lists from companies like listsource and or compile lists from city and county like 60-90-120 days late on mortgage, pre-foreclosure, delinquent taxes, water cutoff, code violation, probate, divorce, etc.

National Change of Address (NCOA) and CASS Certification for the address are 2 that the compiler should supply documents of completion. 

Set aside time everyday to do the activities.That being said Some of the the best ways to find off market commercial and multifamily properties is to compile lists from city and county websites if available or through a paid service like List source, Reonomy and CoStar or you can use free resources like Loopnet, CREXI, Ten-X commercial, Craigslist, tax database, general networking, brokers, property managers, title companies, environmental consultants, building inspection companies, appraisers, landscapers and other companies that service commercial and multifamily properties and driving for dollars.

None of this will give you full protection or anonymity, the point is to mitigate it as best as can.Playing devil's advocate here;The question is a valid one, of compiling knowledge and experience to find has the LLC structure ever "saved" anyone.