Age of construction may not be a huge issue if it has good bones and can benefit from a fairly cost efficient "In & Out" remodel.What is stopping you down payment?

Some also factor for the age of drivers, driving record, prior losses, etc. 

I'm anti fragile.

The main issue with many Philly homes is the age these properties were builtThis give you 2 main concerns:1.

As the population ages I think these investments will become more profitable.

Back in the Middle Ages, when I was a commercial broker, there was a guy named Minh Ho who made three or four offers on properties per WEEK.  

Also, what is the age of each building and the major systems?

We are in the information age!

Generally: 1) you need to call a list of LIKELY motivated sellers like high equity, seller/property of a certain age, inside your buy box, notice of default/liens/etc. 2) You need to make an enticing pitch, "Hi Mr Seller, I'm Gus and I work at ABC Solutions, a local family owned business that helps sellers get cash fast for their homes, would you be interested in an all-cash offer for your home?

Other factors include the age of the house, the specific suburb, the amount and type of repairs needed, etc.