PPR bought the non-performing notes at a discount, got them re-performing, are selling them to willing buyers and my understanding is they usually sell out immediately with over-bidding. 

The portfolio is order to be sold and as we both know if you force a sell many times it means selling at a discount.  

My firm has a fix to rent product that discounts the interest on the fix portion, and discounts origination on the DSCR portion. 

I fail to see how that is any different than Bigger Pockets but people talk about it.There is a very large group that charges $20k to join and has a lot of videos and meet ups and is run kind of like an MLM where they give you a "discount" "to the next level" if you convince someone else to join.

Sorry, I can see offering a discount for a limited time only, after which the price goes up to whatever the full cost is, but NO reputable seller/instructor is going to literally only give you a total of 10 minutes to make your decision.Sixth, depending on the market you are in, and the specific deals you find, $10,000 could be a ridiculously small finder's fee.

are you going to be able to buy deals at a deep enough discount for them to work as a BRRRR? 

Helocs are driven by the Prime Rate which is 3% above the Fed Discount Rate.

Then we see if the current tenant later decides to extend or we list the limited open period, often at a slightly discounted rate. 

If you purchase at a discount, then you'll be capped by your purchase price, not necessarily the as-is value of the property.

Pro - You can get significant discounts buying cash, to build in more equity day 1