Restroom trailers can be a profitable investment for rental companies, event service providers and outdoor venue owners. Compared with standard portable toilets, restroom trailers offer a more comfortable and premium experience for weddings, festivals, private events, construction sites and long-term outdoor projects. This article explains how restroom trailers create rental income, what types of customers need them, which features can increase rental value and what buyers should consider before adding restroom trailers to their business.