Deposit is taxonomy of Inventory post type. You can find this here Dashboard->Inventory->Deposit. You can add unlimited payable security deposit from here. You can set it either per-day or one-time basis. If you set per-day basis then it will allow you to set hourly price for this resource. If you book less than 1 day then the hourly resource cost will be applied. You can also set deposit as clickable or not-clickable. If you set deposit as clickable then the customers can check or unchecked during booking. If you set deposit as not-clickable then the customers don't find option to unchecked it, it must be included during booking. Check these screen-shots to get more idea about per-day and one-time deposit cost. It also has drag-and-drop sorting facilities.
You can add security deposits like the following screen-shot.