This building's occupancy permit dates around 2001, so I think we're safe on the rent control issue. 

On the flip side, it sure is safe to keep property free and clear.

You may feel safe as a law enforcement officer but you may also be liable if that individual decides to murder one of his neighbors.

Given the fact that Roth money was invested post tax annually when I qualified, would I need to pay taxes on this money upon the sale of the property, or would this money grow tax free as would all other gains normally made in the Roth outside of a real estate transaction?

Even without having the highest offer.In most large multifamily transactions, the seller and broker will hold a round of interview calls with the top 3 to 4 buyers. 

Wouldn't they just automatically charge their seller their 6% for both sides of the transaction since you don't have your own realtor? 

Better safe than sorry is the way I look at it. 

If I were to acquire the property, what would I have do to make this a legitimate (and safe) dwelling without putting myself at risk?

My question is: is there a way to avoid this from happening in a future transaction? 

@Gina Mondesir Hello, I've never done any tax lien/deed transactions myself, but I did take a mentor ship program specifically geared towards liens and deeds.