How to close on wholesale deal?

[Abou C.]

Hello

In the process of closing on a wholesale deal, how do i close on the deal with the wholeseller.

1. How is money exchanged?, escrow or certified check?,lawyer?, cash?

2.  Do I involve  lawyer?

3. what are the things should I look into before signing contract or even officially buying?.

4. Should I run the deal by a title company?

 Sorry for the stupid question, just something that been bothering me. Only thing  I am only pulling up is how to be a "wholeseller" but how do I buy from a wholeseller fast yet cover my basis. I understand there are some risk, I am okay with that. But I am trying to put all my ducks in a row if makes sense before taken action.