You might begin looking both at rentals and at property for sale. Most home sellers won't go for the rent-to-own thing but you may have an elderly couple, an investor or someone who has to buy another property out of the area soon and would prefer to rent the house to you than have two mortgages at the same time. And even if they are open to it, they will have to be asked - most won't advertise it.
To look on your own, try craigslist.com or even the Hartford Courant. But ultimately, you probably want to hook up with a real estate agent who can help you find a property.
Also, consider that any mortgage you have on the home in Phialdelphia will affect your ability to qualify for another property, even if it's rented.