Making an offer and Using Contracts

[Montez Greer]

I am ready to make an offer, and my attorney has a contract for me to sign. I've heard that I need to give myself about 30 days to do my due diligence. Where in the contract do I tell the seller "I need 30 days to get inspections done and Contractors in to make sure their numbers match mine."? 

Or do I just fill out my agents contract, with the contingency of closing in 30 days? 

And if I can't find a contractor who can do the job within the price I need, how do I get out of that contract?