Dear Hiring manager
I've just read you job posting and really interested in your project. I am a Wordpress expert as well.
I agreed with your budget problem If you want My budget could be negotiable, and as a skillful Wordpress programmer, I can provide the perfect result.
My solution is first check the code and I will decide how to make plug in for your websites.
Feel free to have a chat. I am always ready for you,
Thanks