Clearly, they failed in their primary responsibility to you as their layer of due diligence was a mere gossamer like patina.

If STR, what about MTR, or LTR as a fail safe?

I know PA has a process to go through before you start a foreclosure, but have never seen a requirement to offer a mod.Sure, https://legal-info.lawyers.com/bankruptcy/foreclosures/delay...Under the Dodd-Frank Act, the bank must first wait until the payment is more than 120 days overdue."

You can probably just go ahead and live in that 5th unit, but I believe whenever you go to refinance it with a bank or what not, the 5th unit will make it require a commercial loan and not residential regardless of what the county records show the property to be. 

Most fail to consider what goes into owning and operating real estate once it’s purchased and solely concern themselves with how to buy the property.

I believe that you don't get returns (failed to deliver) with bulk mailers so you don't know which addresses are bad.That's the simple stuff.My advice is to do various mailings that you or some prepares locally, that go out immediately, using 1st class postage.

One particular point can not be over emphasized; even if someone has and is willing to invest the capital in attempting to build or scale their business or investments, they still May fail if they do not possess or can not evaluate those who CLAIM to possess the necessary expertise required for scaling. 

Go work with community banks, regional banks, and local credit unions.

Quote from @Adam Macias: Wholesaling as it is today will be a thing of the past.It’ll truly be strange to even hear people and gurus trying to make big money off it.The more people try wholesaling but then end up not having an end buyer or cancelling contracts or trying weird things like novations, the more all of real estate will be regulated and cause requirements like licensing to be able to transact more than just your personal resident purchase.Which I don't know why hasn't happened sooner.Here's all the states (in red or yellow) requiring a license to wholesale or at least have started the process:Credit: REITipsterI think licensing and regulation is a beautiful thing that should happen if you plan to be an wholesaler and do more than one deal... which is going to be the case for anyone taking this business seriously.Or even it being regulated to need a real estate agent to do more than one deal outside of buying a personal residence.I've had plenty of failed attempts with agents in pursuit of wholesale deals and I know exactly why, it's not because the agent couldn't find me deals, it's just not practical to think there's opportunity for the numbers a wholesaler needs to make a profit on top of everyone else needing to these days.Because the only sellers who truly can sell at a deep enough discount are usually those who ran out of time and just didn't do something sooner with their situation.I know many coaches and gurus will disagree with me but there’s no regulations on youtube gurus and what they teach either.If we look at the current state of the market in hot cities, the availability of online resources to the average homeowner, how many deals can you possibly believe are available at 70% of ARV?

However, if that effort fails, the local agent is equally liable – criminally and civilly – for any fees, fines, etc. associated with the property."