Hello OCJRP ,
I read the attached doc and understand your requirement of revamping & combining two websites under one website/one domain. I would suggest WordPress - An open source CMS for the development so that you can manage pages, content, gallery images etc from the admin.
I am PHP (v 5.5, v5.6 and v7.x) Expert with 5+ years of experience in designing and developing websites. I am proficient at RWD (Responsive web development), HTML/HTML5, CSS/CSS3, JavaScript, jQuery, AJAX, Bootstrap, and MySQL.
Feel free to ask questions about my understanding on this project or my expertise.
Do ping me sir, so that we can discuss further.
Thanks
Brijesh P, Web Expert.