E-commerce Website Completion for Used Cars

I'm seeking a professional web developer to complete my e-commerce website design for the used car market. The design is currently on Figma and needs to be fully implemented. The site will be based in Bangalore and should be SEO optimized to aid lead generation.

Key requirements:
- The site skeleton includes user login (buy and sell option), dealer login (buy and list option), provision for finance (loan) for buyers, and insurance too.
- Integration of third-party services for finance and insurance options

Important considerations:
- I need your recommendation on the best frontend framework (Angular or React) considering the critical importance of SEO optimization
- I need a comprehensive breakdown of costs (design, development, maintenance) and time estimate for project completion
- Would performance marketing for lead generation be a service you provide as well?
- Clarification on how new data gets uploaded onto the site
- Assessment of whether an in-house team is necessary for ongoing maintenance and database management. If so, what the team size and skillset would need to be.

Ideal skillset:
- Proficient in Figma and either Angular or React
- Strong understanding of SEO principles
- Experience with e-commerce and used car market websites
- Knowledge of integrating third-party services
- Competent in providing cost and time estimates
- Capable of explaining data management and maintenance requirements