Wholesaling: Getting phone numbers? ARV? Contracts? Buyers?

[Dalton Steed]

I am starting my journey into Wholesaling. I've started with "Driving for Dollars", by driving around parts of town looking for homes that need some help. Yard hasn't been mowed, property is messy, house is falling apart, etc. As I am composing my list of "potentials", I have a few questions I am hoping to get answered.

1) What are the best ways to find the phone numbers? I have a simple source, but basically have to google around until I maybe find the owners information. 

2) What is the best way to estimate ARV? Want to make sure there is enough meat on the bone for myself, and the potential buyer to be able to flip, brrrr, etc.

3) Where/how can I find buyers to assign the contract to? Who are the best potential buyers?

4) Once I get the seller set on a price, what are some "must-haves" in the contract to cover myself?

Thank you for any feedback!