Econ restroom trailers from Black Tie Products are available in 8- to 13-foot sizes, and have unisex stalls and porcelain sinks standard in two- or three-stall configurations. They have ducted heating and air conditioning, hot and cold running water, Formica marble walls, simulated wood flooring and aluminum exterior walls. Options such as auxiliary pumps, push-button or handle-style toilets, electronic waste tank monitoring, water heater, winterization and solar packages are available. 877/253-3533; www.restroomtrailersonline.com.