Since you are asking I can assume you do not have the knowledge to do so yourself. You will not be able to get any professional help to help you do this yourself. You can only entrust your build to a reputable shop. I say this in the kindest way FYI.
700 whp on pump with a vg is not simple. 1000 whp with nos requires a specialized maintenance and a deep wallet. Honestly the best advice would be to go to a good shop and open your wallet WIDE or scale down your requirements. All else is just Internet talk.