I've got a 25 quart per day by Whirlpool that I picked up at Lowe's about 4 or 5 years ago. It has casters on it and I can roll it around if I need to. I don't have slide outs but it will fit under the table of the dinette and still have plenty of room for air to circulate while running. If I needed to use the Dinette I can roll it over by the jack knife sofa or down the aisle towards the bathroom.
It holds about 2 gallons and has an automatic shut-off when the bucket is full. I usually empty it once a day. That's after a 7 to 8 gallon shower every other day while running the bathroom vent, using only the microwave to cook or heat up food and using a 4-cup Mr. Coffee machine once a day.
