However I don't know if I can do 100% My last transaction took 5 1/2 months to get to closing after my offer was accepted.

About 80% of the transactions I'm involved with are regular listings.  

Title companies handle a lot of the transactions in PA.

@Jose Diaz Good luck, sir.That is not an easy transaction to close on.I can not think of anyone who would by the home while it still has that much debt attached to it.Maybe an investor who wants in the game but no other way?  

They will probably help you with some of the property research if you use them for the transaction. 

Tell them what you are doing, ask them how long it takes them to close, and that you plan to do several transactions and want to form a relationship with a professional title company.Right now with inventory being down and the market still at a slower pace, it should be easy to form a great relationship with a title company.LanceTurris Group LLC

Whether you can get title insurance will depend on the title company and specific facts of the transaction. 

Couple recent transactions we did was to make a flash offer at the listing price with 12 hrs tag. (1998 and up year built) 

If I make an offer to purchase a property subject to the existing financing with the goal of minimizing my own funds into the transaction, how are the Realtor fees handled?  

You should not have trouble finding a lender to fund the whole project/transaction.