Though the porta potty units are available in different size and shape, you can rent any type of the unit according to your necessity. If you are organizing any special occasion or one-day event, then your preference of renting a unit will be for short time period. At that point of time, you can go for the high standard unit if the occasion or event demands the expensive unit, if not then you can rent a basic level unit at the affordable price range. You can also rent mobile shower trailer and mobile restroom trailer for the short-term rental deal, no matter where and when you need the facility. http://www.portapottydirect.com/Products.aspx Call 877-240-4411.