Rental Demand Philidelphia?

[Isadore Nelson]

Good afternoon, I've been exploring options to acquire a property for long term rental in the Philidelphia area. 

I have found some options which seemed ideal in sync with the BRRRR method, however from looking on sites like Zillow and Redfin, there just seems to be so many available options, for nice rentals and good rates, so would it even be ideal to buy in the area if it would be so difficult if even possible to find a tenant? What are the chances I'd be stuck with a vacant apartment?

I'd appreciate any insight or leads.

Thank you!