Hello there :) I am a native English speaker, who's taken multiple creative writing classes. I've written small romance books that I've yet to publish. The books are 43,000 words generally (and still growing), so 15,000 words is a cinch.
Writing romance novels are my passion, so I would be very excited to be able to constantly write what I like. I would be alright with the starting salary that you mentioned, though with how much I edit and plan out my stories to make sure they are perfect, I would like a little more for my efforts. Writing vampire, ghost, fae, werewolf, you name it, stories would be perfect for me to do. You name it, I'll make it work. I've read many paranormal romance books in my years, thanks to me being a girl.
I do have a sample of some of my work, written below (this is of course, after all the bonding between the two main characters).
She looks back at me, her eyes starting to glisten. My heart drops suddenly in my stomach, afraid of what she might say. I don't want her to look that way.
"You're immortal, Jack," she whispers. "And I'm mortal. I can die."
At those words, something inside me snaps, and I quickly grab her wrist.
"I won't let you," I snarl, unaware of my tone. "I'll find a way for you to be immortal whether it kills me or not. You won't d-" I can't even spit out the word. I look down at her hands, unable to face her quivering lip. It makes me feel so weak, that I don't know of a way that we can be together. I must find a way.