Warm Greetings,
Would like to discuss with you more on this before commenting. And for your questions:
1.) Yes we will be available for future updates and bug fixes.
2.) Will let you know once we discuss more.
3.) We have done many good Wordpress websites the links will be provided once we discuss.
4.) Yes, we will add you in our internal management system, where you can directly communicate with coders and see the updates regularly.
Looking forward to talk to you.
Regards
Viv