Case in point - I just closed on a house of Friday that was listed on the MLS for $120k.

I suspect that as long as they're functioning you wouldn't have much of a case in court however if you have a good relationship with your landlord you could probably send out a friendly communication expressing your concerns.

A lot of landlords expect 10% Cap ($1000/unit in your case) in Pittsburgh and your unit would need top range rents to meet that.

Case in point you can't "work" 24 hours / day but you can earn income is 24 hours / day if you have several sources set up to do so.1.

There is a court case in California in which a buyer was required to forefeit a very large EMD (six figure) on a multi-million dollar house.

These numbers are really tight, but this is often the case in NYC area. 

So if you go to sell or refinance the house to a conventional loan later on in life, you may not be able to unless the renter agrees and now you have lost control of the property.I don't know if this is the case in California, so just be sure to do your homework. 

Case in point: A young couple buys a house.

Make extra copies for the judge and the opposing side.Present your case in a coherent and concise way.

Not always the case in older homes.