How exactly do you make a contract?

[Hornaldo Jurk]

I am only planning to wholesale for now, so I know I'd need a purchase/sale contract and an assignment contract. But as I do more research there are bunch of other stuff like notes and deed contracts. If you go to an attorney to create a contract, do you pay for each and every contract that he creates for you? I heard they were a couple hundred a piece.. How do you guys afford all the different types? There seems to be wayyyy too many.
And if you have to alter a couple statements in a contract for a different deal, do I pay full price for them to write up another contract? Or is that when they add addendums and other stuff to the contract?
I know it's a stupid question, but I have no idea whatsoever on what goes in a contract.. or about contracts in general at all.