Also not sure about other factors.

Factor those in and I don't see any other reason why not.

Roofs maintain the integrity of the rest of the house and should be maintained as such.The price in which you purchase the property should factor in the age of the major mechanics along with windows, roofs, and siding considering where they recommend in their life cycle. 

Also, you will need to factor in the monthly condo fee that would need to be wrapped into your rental rate.If you are setting your price point based on a purchase in South Philly-just south of Washington Ave (which is adjacent to Center City proper) then you will be able to find many potential purchases for rentals here. 

Remember to factor in closing costs and realtor fees if you are flipping for full retail on the MLS.

On June 18th my beautiful, healthy, vibrant daughter was born.

I highly suggest factoring PM in even if you're doing it yourself.

You also need to consider your income when factoring financing.

It depends on a lot of factors including price, time and interest barriers, property availability etc.  

So if these 2 factors are fairly similar to some other businesses or investment strategies, #1 They highlight their best successes, #2 they use primarily debt to buy property, then there is really no reason to hate a guru program, unless you also hate the other persons or companies who behave the same way.