Hello!
I am a graphic designer with over 10 years experience in designing all manner of branding, identity, and marketing collateral. As such, brochures are a mainstay of my studio's work.
My basic process is to (1) hear what you need and see what I've got to work with, (2) quickly work up a concept for your review, and (3) based on your feedback create the full layout, submit it for your review and comment, and then finish with corrections or last minute changes.
Working this way, I've found that completing a brochure goes very quickly and feel comfortable completing the project in 3 business days or less.
I generally supply a full working concept in 1-2 business days. Since you've already provided your needs, we can quickly move through step one. If your copy is ready, as well, this may actually be a 1-2 day process from soup to nuts!
Normally for a simple trifold brochure like this one I would quote a client $150-175, but because you're asking for original files I have adjusted my proposal to accommodate this request.
Please let me know if you need further details of my qualifications or if you would like to submit further details for my response. For instance, is there a separate budget for stock art? I could not tell from your listing if the expense is included or not. At these rates I do not generally include stock art.
I look forward to hearing from you.
Thank you!