Additionally, please share if this was a scam or not.

I was interested in something like owning a rental property as a way to generate some additional income. 

It was held by the previous owner for a very long time, so I wouldn't be surprised if some basic facts about the house are incorrect.I was making an offer on a house a couple years ago and discovered that the owner was paying taxes on an additional house that was on the neighbors lot and didn't know it!

We’re fortunate to have an above-average income and live well below our means.This summer, we’ll be moving to Detroit (PCSing in August), and we’ve saved about $120,000 to invest in addition to having funds set aside for the home we’ll purchase in Detroit.The reason I’m posting is that I’m struggling to decide how to best allocate the $120k.

These are professionals with additional training and a stricter code of ethics.

There are also additional costs of operating and maintaining an LLC, like separate bank accounts, annual report filings, tax filings, etc.2.

There are also additional costs of operating and maintaining an LLC, like separate bank accounts, annual report filings, tax filings, etc.2.

Then it really grows with each additional one. 

In addition to offering "cash for keys" assure them that they can use you as a referral on their next tenant application, or offer them a short term-2 month lease.

I agree and additionally I'd recommend going down to the store and actually feeling them.