If the roof collapses (as it did on a related property) it would appear I'm totally on my own here.

Loc has good reason to look at balloons as a future disaster, most all are very poorly underwritten, usually just agreed to, without any due diligence and yes, those collapse.

You sewer collapses?

As an added bonus; the tenant broke into the property a few days after her lease wasn’t extended, poured cement down the kitchen sink and turned the water on causing the entire floor to collapse in that section of the building.

I don't think a collapse will be headed our way, but I do believe that we will see home prices begin to plateau until rent values come up and encourage investors to push towards SFR's instead of multi family.

I was there in 2007-2008 and watched my real estate investor friend's portfolios collapse one by one.

There is so many videos/articles of how were headed for another collapse. 

We purchased a property with a collapse porch.

That will pay for medical, plus a nice amount for spending money while I build up my business.My goal is to forget SS and assume it is just a government ponzie scheme (which it is) that will collapse before I get my investment out.

It's possible you mis-interpreted what your agent meant when they said you could renegotiate after inspection (usually that means for major issues like dangerous electrical panels, structural issues, partially collapsed cast iron sewer line, etc. that weren't obvious at the initial showings, not superficial things like "the AC is rusty" or "we should replace those ugly fans").