I drilled two holes in a piece of angle aluminum and attached it to the PTO as a temporary hand prop. I added a pole and removed the spark plugs to make it eaier to turnover the engine.
I read a blog comment from a Rotax Rep that turning the prop 50 times once a month or so is sufficient to keep the engine lubricated while not in service. It took over 100 turns to prime the oil pump, but seems to circulate fine now. I cranked another 50 on it and called it a day.