Ironically, I live in Hawaii and am looking to get into the Pittsburgh small multifamily space.  

That is one idea that would seem to work for you amongst others but seeing that you want cash flow, don't want to worry about financing a deal, just go find expert (syndicators) that can get you into deals that create excellent cash flow and IRR (think 10% CoC and 20% IRR as achievable in this space) and let the syndicators leverage their assets to get the financing, take all the risk, you come in as a limited partner, help fund the deals and get paid quarterly cash distributions.  

There's a large, unused space that's bare bones on the ground floor (as in looks like a basement, concrete floors and walls)  that could be renovated into an extra 1 bedroom unit.  

A few years ago Hammond cracked down on "split" properties; where LLs took SFR's and converted them to duplexes/tris by making the basement or attic areas separate living spaces.

Office many of the tenants can downsize to off the beaten path office locations or warehouse type space.

Make sure that the phone numbers you store for your friends are numbers only, no spaces or dashes or anything else.

If you test and no mold you'd be out the $400.00.I'd get the spot on ceiling figured out. you can use a moisture meter to see if it's damp and if it has attic or crawl space above get in there and check it out. a roof leak can travel and is hard to spot so if you can't figure it out right away go right after or during a good hard rain.As for the toilet, replace wax ring, the toilet may be sweating, it may have a small leak causing more sweating so get the flapper looked at, to limit the moisture around the toilet.I had a tenant do a mold test on my unit unannounced to me.

Would love to hear more things about good condo investments in that area where tenants would have to fight for living space!

This is sketchy to me- maybe the house in question has 300 sq feet you'd obviously turn into finished space to make it comp? 

Here's where the story gets interesting:  The second delinquent tenant rented the shared unit from me and split the space with his attorney whom he ran a side business with.