To save time and budget, you can check the AppExchange for prebuilt solutions that can be easily customized for your needs. AppExchange is a marketplace for apps, components, and consulting services that extend Salesforce functionality.

A master-detail relationship is a parent-child relationship in which the master object controls certain behaviors of the detail object. The master object can be a standard or custom object, but not all standard objects support being a master. Roll-up summaries are fields that calculate the sum, count, min, or max of child records. The owner field on the detail records is not available and is automatically set to the owner of the master record.

Dynamic dashboards allow you to display data according to the security settings of the running user. If users have different access levels to data on dashboards, you can use dynamic dashboards to show them only what they are allowed to see.

Bucket column allows you to categorize report data into groups without creating a formula or custom field. You can create buckets for different ranges of values and assign labels to them.

Chatter broadcast group is a type of group that should be created to meet this request. Chatter broadcast group is a group where only group owners and managers can create posts, but anyone can comment on posts. This can be useful for sharing important updates or announcements with a large audience without cluttering the feed with other posts. Reference: https://help.salesforce.com/s/articleView?id=sf.collab_groups_create.htm&type=5