Do I concentrate on paying it down and increasing my credit score?

I've only been concentrating on all the ways I would fail.

Get your weedkiller concentrate and sprayer out!

You need to decide what area of RE investing you want to concentrate on.

Do you specialize or concentrate in a particular class of property?

I understand I might not get that lucky but unless the house is in the worst neighborhood ever should I concentrate on the right flip for me and not worry if it's not located in my target zip code

Tom, Instead of concentrating on a number of houses to buy (or number of doors - this is what I would advice everyone to do instead!)

I think for starters, I want to concentrate on south central PA, because it is close.

Once you have built your reputation as a "Neighborhood Specialist" then you can concentrate on becoming a "Listings Only" Agent.  

Typically, a licensed agent or a current property owner with experience in the product field you are concentrating in will be the best help.