Choosing between a 2-stall and 4-stall restroom trailer depends on more than trailer size. Buyers should consider event type, guest count, available space, water and waste tank capacity, transport cost, cleaning time and rental income potential. This article explains the practical differences between compact 2-stall restroom trailers and larger 4-stall models, helping event rental companies, venue owners and outdoor service providers choose a trailer that fits their business needs.