We need a voting script.

Greetings!

There is a need to implement a similar voting script as on the site Texto oculto
Where, on the basis of positive or negative user ratings and their feedback, statistics are displayed on the home page in the form of “bars”.
Bars need to be implemented in a more modern way.
It is also necessary to have functionality regarding the implementation of comments "representatives".
Specifically interested in the block add "advantages" - Texto oculto and the addition opposite each element.
The comparison system is also well implemented on this site. It is necessary to do the same.
There is a little understanding in php, so if it can be implemented without creating a complex admin, then good.

There is no specific reference to the CMS, if there is an understanding of how this functionality can be implemented for any specific CMS, then it is simply great, because it is not a problem. It will be necessary to implement e-mail distribution for registered users, as well as to verify users (you can only vote by registering and logging in).

I will be glad to find a specialist who will be able to implement all this or who already has any experience on third-party projects, because. There are many additional nuances that will be described in the task for a long time.

The project is a pilot, we can say a startup, and if the circumstances are favorable, a specialist will be needed on a permanent remote basis, for editing and making changes to the script as a whole and implementing the visual part on the site itself.
Please tell me at least the approximate price.
Thank you!