Way too complicated. It's better to keep it simple. ...and remember... don't dump too much fertilizer all in one place.
Not exactly an "Energy Star" rated appliance, either. Those heating coils suck some kilowatt-hours.
The upside, though, is the potential for mischief after emptying the ash bin. Bring some to work mixed into one of those "International Delight" coffee flavorings - and offer some to your liberal co-workers or employees. :-)
Um, that’s not a toilet, it’s a TreBouchet