.), but I am concerned as utility costs rise that I will be unable to keep passing on the 2-3% yearly increases to tenants once we hit the ~$800/unit rent mark.

It's not the assignment so much as the conduct in connection with contracting, what you might say, the undisclosed intentions, the deceptive practice of "omitting facts" (another aspect of bank fraud) applicable to a transaction.While in the past, these issues with those in FC were pretty much ignored, not now, probably due to the rise of the scams and false contracts that harmed the borrower and other related parties, especially lenders.

I don't know from experience, but, I've heard that Berwyn is on the rise.

This combined with the rising rents as people who had a foreclosure had little other option have meant dropping home values and a rising rent market.

Nothing worse then selling a house and getting a call the first 20 degree or 90 degree day that the system will not maintain temperature and the contractor is not answering his phone :) good luck 

If indeed you find that all filings for that property including schedule E are only attached to your return then you and your accountant can explore whether or not that in and of itself rises to the level of "ownership" necessary to claim the sec 121 exemption once you convert it to your primary residence.  

What if interest rates rising next year and properties value going down from 550k to 450k, I can't get 100k cash out.

Most shielded/sleeved PEX is typically, rated for extreme temperature ranges (high/low) and will hold its shape and integrity better in those situations. 

As ARVs rise, the dollar amount becomes more of a factor than the percentages to determine how much potential profit is worth pursuing?

So rental properties, more specifically high rise condos.