Hi Jimmy,
Below are my answers for your enquiries:
1) Yes, it’s compatible with latest version of Joomla
2) Yes, we use the default menu module for the TOP navigation, the main navigation is megamenu of T3 framework.
3) You can use K2 with default style, pls note that JA ACM module in this template works with Joomla content only, not K2
4) Yes, you can adjust the width of template. It’s built with T3 framework which implemented with Bootstrap
And of course, it supports responsive layouts.
You can use the template on as many sites as you want, however if you purchase the Single License then you can only receive support for one site.
Let us know if you have further questions.
Regards