Almaqam-Final Phase-Web

We have brought the activity module vehicle change in the standalone. For fixed package, client will add shared activities where vehicle is not needed so fixed package is fine and no change in the activity. But for dynamic package, client told we need to bring the activity change. As per client, need to show only private activities. Need to show the lowest activity in the summary page. Then we can edit and select different private activity. It takes to the activity standalone details page where we can change the vehicle. Please let me know the effort for this.