Yeah , just about same with my calculation. That's why I said he will only get a cheaper version with WP or any other script because that's a large corporation... For the Template good noting that is an AMP template.I'm quite sure this is a custom built application. The iPrice group is a big Malaysian company with websites for many countries in Southeast Asia.
The template 'Mustache' mentioned by @Mikel kraft is part of Google's official AMP project (see here: https://amp.dev/documentation/components/amp-mustache/) on which the front-end of the site is built.