Business Proposal Translation English To Spanish

I have about 358 pages of an English business proposal
that needs translated.
Correct Spanish grammar and spelling important.
Freelancer will give me Spanish version of the proposal.
I will not share proposal content until after I award project
and Freelancer signs NDA (non-disclosure agreement)
Freelancer will sign a NDA to not share any content with
anyone else.
Please be competitive with cost. I am shopping for best
price and quality of work.