Migrate Base44 App to Webflow

I have a maternity health tool built on Base44. I need to migrate it to Webflow.

The following requirements:
• Migrate all content + tool functionality from Base44 to Webflow
• Maintain user experience (women should have seamless transition)
• Set up Stripe payment integration for Advanced Access upgrade ($99-150)
• Basic SEO optimization (meta tags, structure)
• Mobile responsive design
• Fast load times
Current platform: Base44
Target platform: Webflow
Timeline: 2-3 weeks
Budget: $500-1,000 AUD

Requirements for contractor:
• Webflow certified preferred
• Experience with payment integration (Stripe)
• Portfolio of similar projects
• Australian or AU-friendly timezone preferred

Can you provide:
1. Timeline estimate
2. Cost breakdown
3. Examples of past migrations
4. Process for handling during transition (users don’t lose access)