Hello and thank you for a chance to offer you my services, I can design pdf form for you and I would recommend to reduce the size of your form to 2 page. Also, you need to be aware that drop-down menus are great if you want to use your form as digital form only. But if you would ever consider to share printed versions of this form then you would prefer to use check box selection instead of drop-downs, so users can see available options on paper.
I look forward to hear from you soon.
Best regards,
Sergiy.