Translate Eng-Por cookbook approx 120 pages in 3 weeks

I need an—experienced Spanish translator for a Spanish cookbook with around 60 recipes and approx 120 pages, ensuring it has no spelling, grammar, syntax, or punctuation errors.
We require changing the measurements used in Latinoamican and Spain. The payment is $450, divided into 3 milestones. The dateline is 3 weeks, including the revisions of the work.
I will ask the applicant to translate one recipe before giving the offer to do the work