We need to build a Multi-Approver Member Directory

We need to build a Multi-Approver Member Directory.
Given below are the requirements.

Is it possible to create a multi-level approval process for the listings as per the given below requirements in community builder?
Please let us know whether the given below features are available built-in community builder.
If customization required, how much time and cost required for the same.
Also let us know whether we would be able to upgrade future versions if we do the customization

There will be different levels of approval required for the listing to be finally visible in the website frontend

Types of Memberships
There will be different types of Memberships like:
Full Member
Consultants etc

Based on the type of Membership chosen, Membership Application should dynamically change.
(Different input fields for different types of Memberships)

Levels of Approvals 1. REVIEWERS 2. BOARD MEMBERS 3. ADMIN

3 levels of status required for each listing
• Approved or Rejected by REVIEWERS
• Approved or Rejected by BOARD MEMBER
• Approved or Rejected by ADMIN or PUBLISHED

User submits the listing

First level approval by REVIEWER
Status changes to Approved or Rejected by REVIEWER. If there are any recommendations or information required for the listing to be approved, then there should be a Text Box where the REVIEWER enters the same.
Mail should be triggered to the LISTING USER, BOARD MEMBER and ADMIN

Second level approval by BOARD MEMBERS
If the REVIEWER has approved the listing, the same can be reviewed by the BOARD MEMBER and he/she approves or rejects the same. The status changes to Approved or Rejected by BOARD MEMBER

Final level approval by ADMIN If the BOARD MEMBER has approved the listing, the same can be reviewed by the ADMIN and he/she approves or rejects the same. The status changes to Approved or Rejected by ADMIN and listing becomes finally visible in the frontend.

Mail should be triggered to the LISTING USER and ADMIN

Thanks and Regards,
S.Maheswaran

There are no multiple stages of approval in CB. The registration is either approved or rejected. If approved they can then login. Approval can only be done by CB Moderators and of course anyone with backend user management permissions.

As for the different memberships yes that's easily doable using either CB Conditional to show/hide fields/tabs based off other fields or using CBSubs plans to hide fields/tabs based off plan selection.