WordPress VIP hosting is limited to one application per plan. That means you can install either one single-site or one multi-site (with as many sub-sites as you need) in one application. If you have more than one site, contact us and we'll help you select the best option based on your needs. You can read more details on product definitions and limitations on this link: https://wpvip.com/product-definitions (no WordPress VIP Add-Ons are included in the hosting option offered through Saucal).