Thank you for interest in my theme. Unfortunately, as I sell Polyclinic via ThemeForest, it does not offer any bulk license. And as I am exclusive author to ThemeForest, I can not sell the theme anywhere else.
If I can advice, try using WordPress multisite installation. I think you can then use the theme for multiple sites on such WordPress installation (possibly while they are on the same main domain). And if you decide to go that way, I would appreciate very much if you bought some more licenses for the theme, not just one. But it’s just my recommendation, no obligation.