I didn't hear of him after that, until he shows up at CCIA promoting some bus trip.

In the end the mortgage will still be in your name, and you're ultimately still responsible for the payments since there's a personal guarantee.  

So Peerstreet ended up foreclosing, and ultimately netted about $3 million on the subsequent property disposition. 

Your returns in investing ultimately come from exchanging terminally abundant goods (fiat dollars, debt/future fiat dollars) for terminally scarce goods (high quality, supply constrained real estate).Selling to go into cash isn’t of interest unless I have a short term need for that cash or am funding another purchase.

Agreed with above - explore every low cost option to collect, but ultimately, it is the cost of doing business. 

In my area it is common for landlords to pay for heat which promotes a lot of abuse with the system in that tenants keep the heat at unreasonably high temperatures and often open the windows in the dead of winter when it can be -20 out.

If im paying my agent, ultimately im increasing my purchase price, right?

Every 5 years there will be a legitimate strategy that gets promoted as the newest "Get rich tomorrow" BS that gets overhyped by the sharks. 

I ultimately started focusing on the Midwest and have been pretty happy so far. 

However, ultimately, make sure you have a viable exit if you can come to a mutually beneficial agreement.