To be honest, I could probably complete this project in less than two weeks. As someone who teaches writing, I train my students to compose, organize, and complete fairly lengthy projects in a short amount of time. In short, I teach and practice good project management when it comes to writing. Most recently, I completed a 40 page academic document in a day, which received great reviews.
In terms of creative writing, I write constantly. I have published two short stories, and I am currently working on revisions of two novels. Though I have not written erotica before, I believe that I am up to the task given my other writing experiences.
Should you hire me, your novellas would take first priority of completion. I look forward to the challenge.