Hi,
I'm a Wordpress developer from Vietnam. I have read your project requirement and I am interested in.
With this requirement and your budget we can use the free WP plugin: GravityForm to build the quote request page. I can help you config and setup it, you can export, can get email notifications ... when visitor submit a request, and I can do customization to allow logged in user see their request history.
Let me help you.
Thanks,
Jimmy