Has anyone built or seen an outhouse that features a gravity flush toilet? I'm looking to build an outhouse for the summer use and was thinking ventilation and then thought, why not use an actual toilet with a water tank? Water will be readily available, but power will not be so a small bilge pump wouldn't work. I would fill it probably once a week externally, that would be at most. Would this work? I prefer the comforts of sitting down on a toilet when the need arises.