Custom Web-based Invoicing Tool

I'm looking for a freelancer to develop a simple, customized web-based software for my business.

The software should include:
- Customized templates for invoices, receipts, and statements (I'll provide the designs)
- Customer management feature
- Sales reports generation
- Invoices and statements accessible to customers via download links

Ideal Skills:
- Experience in web-based software development
- Strong UI/UX design skills
- Familiarity with customer management systems and sales report functionalities

Please provide examples of similar work done and an estimated timeline.