Floral Typography Design for Website Banner

Hi there, I'm looking for a few floral typography designs for the website banner of my literary magazine. If our visions are aligned, I may also hire for logo design as well as general imagery for future publications. I'm interested in both color and black and white designs. Files loosely aligned with the general vision are attached.

My questions for you:

* How many revisions/how much back-and-forth refinement are included in your service?
* What types of files do you provide for the finished project?

Thank you!