Word-of-Mouth contribution site (Expert, Company)

At the request from my client I am using WP now and I am creating a posting site like an eating log site. I would like to apply the core user management part and the word contribution part of the site as an application. Can you offer possible deadlines and budget after carefully reviewing the following contents? --------------------------------- 【System design of word-of-mouth contribution site】 ■ Site overview Professional site introducing experts in each field Site users can post reviews to any expert. ■ Background Currently only at the front desk at WP, we are building a site. I would like you to adapt the front screen of the application and the link to the created page according to the current page composition. As for current user management, we use the wordpress "Simple WordPress Membership" plugin, but it does not become the function you want, We have decided that customization of the plug-in, or system construction is necessary from the beginning. WEB version of experts posting website created URL: https: //[login to view URL] Used theme: http: //[login to view URL] ■ Summary assuming that a request is required: As the best system configuration for me "System with Wordpress and PHP framework (such as Laravel and CakePHP)" The URL may also be one of [login to view URL] I thought that it is content that will move PHP framework in Wordpress environment. Introduce CakePHP (installed on the server) to an existing Wordpress site and add new functions (14 main screens). 【Target page】 1) ■ Expert list 2) ● Login page 3) ● User page 4) ● Posting page 5) ● Paid entry post registration / modification / deletion page (page 3) 6) ● Evaluation sheet purchase page (with paypal button) 7) ● Logout page 8) ● Member registration page 9) ● Free experts member registration page 10) ● Paid expert registration page 11) * expert introduction page 12) * Professional Detail Profile Page (Paid members only) 13) * Feelings for expert work (paid members only) 14) * Expert company information (paid members only) Supplement * Plug-in installation for calling CakePHP to WP is necessary * The screen of the new screen is created by us * Create a new login function on CakePHP side * Make the login function of the current site temporarily and do not need the future * We do not stick to development methods and languages. I'd like to propose how much cost and schedule it would be necessary to develop such word-of-mouth application that works with the site.