Native Portuguese proofreader

Hello, I have a 17,000 word translation from English to Brazilian Portuguese that needs to be checked. It is a technical text, a steam, air & gas driven installation operation & maintenance manual, translated by a Brazilian translator. We will only consider those native Brazilian translators who have proven experience in the field. If we're satisfied with the work of the selected proofreader, this person will be receiving rather large translation jobs in this same area. We will not pay more than USD 80 for this job. All bids from non-Brazilian providers will be disregarded, as well as bids over USD 80. Happy bidding!