Creative content development

Dear writers, I have a requirement for 50 articles/web pages for various clients. This could lead to several other projects of increased size in the near future. I am looking for writers or companies that can: a. Provide original and unique content. b. Copyscape their work prior to sending it to me. c. Edit and proofread the material. All rights will belong to me. The budget is really low so please bid accordingly. Looking forward to your bids. Thanks Mercy