Tiny House Boats [see TinyHouseBoats.net ] are modern TinyHouses built on a pontoon boat platform so that they can be moved to their permanent or semi-permanent locations on lakes and possibly salt water locations. We have a trailer that can pick them up off the ground where they were built and put back on the ground or floated off at a boat ramp and towed or motored to their new location.
This has the advantage of getting a Tiny House on the water with a much simpler and likely less expensive process as the work of building the home is done in a convenient location. They would still have the TinyHouse look and function.
There are two ways of dealing with waste from the toilet:
1. A 'black water' tank onboard, like a boat with a macerator pump, to pump to a larger onshore tank which can be pumped out by a 'honey bucket' type service on a weekly basis, costing about $100/mo.
2. A composting style toilet which uses solar technology to reduce the volume of fluids with some regular additions of compost starter and less frequent removal of soil.