1. As an individual developer leading a team of 20 talented professionals, you can be confident that choosing me for this project means getting access to a diverse range of skills and the ability to work at scale. So whether you need the combined talents of my team or prefer an independent freelancer, I can deliver accordingly.
2. While I excel with various languages and frameworks, Java has always been my comfort zone. Growing up with Java as my core language for coding projects, combined with a deep understanding of its frameworks like Spring, Hibernate, EJB3andPrimefaces, equips me to handle complex migration requirements such as the one described in your proposal.
3. Talking about the best client-side framework for a Java project, I'd certainly choose JavaServer Pages (JSP). Its seamless integration with Java ensures efficient server-client coordination on behalf of any project built on this language, and it's a skill that I have mastered finely. Combining it with my excellent problem-solving abilities and smooth database handling on my side will guarantee an impactful migration process for your PHP web event site.