Hi,
I specialize in creating custom-made, interactive PDf forms. I had a look at the file you shared and converting it to a fillable PDF form is certainly possible, but some of the things you mentioned might not be (expandable text fields, having the form fields in Word convert to PDF fields automatically, etc.).
Also, it's not clear how you want the multiple choice questions to work in the PDF (using check-boxes? radio-buttons? text fields?), so I set my bid at a slightly higher price, as this will mean additional work to set up.
However, I'm available to start working on it right away and will deliver to you a quick and professional result.
A little bit about me: I'm an Expert on both the Adobe and AcrobatAnswers forums and have a website dedicated to my custom-made tools for PDF files that you're welcome to check out (Google my handle-name to find it).
You're also welcome to check out my work history on this site and see some of the PDF-related projects I've worked on in the past.
Regards, Gilad (try67)