New website development - forum for consumer complaints

Attached is project description - this is enough to give a quotation. Selected bidder will be given exact GUI requirements. Website needs to be developed using an open-source content management system like Wordpress, Drupal, Jhoomla etc with full documentation of code level details. Documentation is given priority to ensure any other developer can maintain this website later on. It is expected that this website will have 1,00,000 page views/day. Therefore performance of website is important. Payment stages via escrow: 1) 50% payment when website is ready for testing. 2) 25% payment after successful testing completion. 3) 25% payment after website is in live operation for 2 months.