Copywriting 500 real estate listings

I have a real estate listings website, and need help from a creative, native-speaking english writer who can re-write existing copy for the description of luxury houses, and supplement with additional information from the source listing website, as well as a 3-4 other websites. Each listing has a 250-300 word long description, a 30 word short description, and a "property highlights" of 75 words- all drawn from the same information. The writer needs to be comfortable writing creatively, and using images and floor plans, as well as information about the locations, and supplementary websites to embellish the listing. Its important that the copy is unique, has good SEO benefit, but also sells the property. Each listing will take around 1-1.5 hours to re-write, and I have in total around 500 listings to do, so I'm interested in establishing a relationship with 1-2 copywriters ongoing to work through the database. To stat with, I will get 5 listings re-written by several writers on hourly rates, before locking down on a rate per listing at the quality I'm looking for. Thanks for your interest.