Seminars on how to win at Blackjack, how to invest in stocks, how to be a better husband/father, religious teachings, shoot, I even went to a seminar on how to be a better waterfowl hunter. 

Only when they get a new QB and the Cowboys actually win a Super Bowl:)

But if my options for investing my $10M lottery winnings (after taxes of course) were to put it into on investment that earned a decent return or thousands of smaller investments that earn great returns, I'd probably go for the single investment for the sake of simplicity (think management, taxes, liability, etc).  

That is a great picture to take to your property tax Appraisal Review Board hearing - you are guaranteed to win your protest!

One that I have no way of looking inside and estimate repair cost, two I am not sure if there will be other parties coming after me if I win the auction， three I don't know if I can get the people out without them tearing down the house...

If your end buyer is a rehabber, make sure to thoroughly analyze your properties so that it’s a win-win for both you and the rehabber.

It should be a win-win for all parties concerned.

They'll know what "Due-Diligence" means and put in the work to find you those deals and when they do, make sure to use them to purchase and re-sell so that way you win and they win.

You'll win easily because no judge would ever deny homeowner their right to live in their own residence.

If there is money made from doing a deal together, then it's a win-win.