How do I manage the property, will hiring a property management company be sufficient to run the property from day to day? 

There is no easier way to fail than to start investing without sufficient capital to weather the storms that inevitably arise.

However, I need a contractor that knows Philly is conformable with rehabs and is self sufficient. 

Hey Henry, in a nutshell - DSCR loans are self sufficient in that they will work as long as the rent and piti are 1:1.

I would think that your property management company's online software would be sufficient for you to view your rents and expenses on a real-time basis, which would allow you to manage your LLC's cash flow pretty easily.  

If you don't have sufficient equity in your primary to take out a HELOC that would cover your required deposit, it's back to finding someone who DOES have money, to make it happen!

Quantity is the key when inventory is low to get some deals.  

@Erik Johnson the easiest way I can think to approach this problem is first to find out if you can qualify for a new mortgage of sufficient size to buy your new home, while still holding onto your first mortgage.  

When vacancies arise in large quantities, I expect we'll see some rental rate inflation.Bottom line- if you buy intelligently now, you will have nothing to worry about later.

Trouble is, if there's sufficient proof of self-sustaining income from your proposed purchase, your COMPETITORS will make it that much harder for you to score a BARGAIN.