My first call back

[Miles White]

I have been sending out mailers for the past two weeks and I just recieved my first call back ( Yay), the guy lives out of state, wants to sell his fathers property immediately, and the house from what I have seen through my research is in great condition. The guy was sounding like the ideal canidate for a first time wholesaler, but his father has $155,000 dollars left on his mortgage, this to me sounds like a "subject to" deal which I have no experience at all in so I would love some feed back in what steps I need to take to make this deal happen or even if I should go forth with this deal?