Full bathroom in a container is doable. Compact layout at 3×4 ft is a wet bathroom with toilet and shower combined. Standard at 4×5 ft gives separate shower, toilet, sink. Spacious at 4×7 ft only in 40FT units. All our units come pre-plumbed. You need fresh water (1/2 inch PEX), drain (3 inch ABS to septic or sewer), vent pipe through roof, water heater (tankless electric saves space). Fixtures: composting toilet or low flow 0.8 GPF. 32×32 shower base. Wall mounted sink 18 inch max. 50-80 CFM exhaust fan is non-negotiable in a steel box. Our 20FT Premium and up include a pre-installed bathroom with toilet, sink, shower, water heater connections. The villa has two full bathrooms. Questions? info@atvworldwide.com.