Restaurant Menu Importer Development

I'm seeking a developer to create an importer tool that enables a non-WordPress admin user to update a restaurant menu, consisting of both food and beverage items, using Excel. The menu is spread across several pages in a specialized restaurant theme and will need to be updated weekly.

Requirements:
- The tool must be user-friendly for non-technical users.
- Must support Excel format for menu data.
- Should accommodate both food and beverage items.
- Need to ensure that updates reflect accurately and promptly on the restaurant's site.

Ideal Skills and Experience:
- Experience with WordPress and specialized restaurant themes.
- Proficiency in developing import tools for Excel data.
- Strong understanding of user permissions in WordPress.
- Ability to ensure seamless integration and updates without technical issues.

Please provide examples of similar work done and a timeline for completion.