Question for all you foreclosure buyers out there: How do you conduct your due diligence to make sure all the junior lien holders have been properly notified/served in the case of a judicial foreclosure proceeding?

In a reverse exchange the QI sets up an entity that will take title to those three properties using a single purpose LLC called the Exchange Accommodating Title Holder. 

The lender will get a copy of this policy and will see the new policy holder being different than the borrower they have on the loan and you can get notices of breach of contract at that point? 

It's a gut feeling on your part, nothing more.If deflation takes hold, it won't matter which market a debt holder is located in, they will get crushed.  

The amount that they're owed if they're the only lien holder?

In our area a one bedroom voucher holder can afford a two bedroom rent, so the only people who rent one bedrooms are people living in weekly rent hotels - basically one step away from homeless. 

https://www.primerus.com/business-law-articles/a-warning-to-investors-in-florida-superior-liens-survive-foreclosure-sales.htmThe mortgage holder's lien will not be wiped out by the HOA lien, so you need to make sure there is no mortgage on the property.  

How do you go about being able to rent to Section 8 voucher holders?

Welcome fellow buy and holder.

I have wholesaled many times and to be honest, I could not have wholesaled a single one as a newbie without the background experience and education I received by investing as a buy and holder, a flipper, and a developer.