Brochure design

We have a business 2 business conference brochure we would like designed for the North American market We have the copy and some styles we like we have some photos and some styling and logos to work with. The final brochure you would provide would be in pdf. Once created, it is likely there will be minor changes every couple of weeks for 3 or 4 months as the conference program develops and additional speakers, sponsors are added. There will be another brochure in a few months time.