There are some makes that do a version that does not have to be hand cranked - I believe the whole operation of engaging and driving is done from the remote control - but I don't have any experience this, and of course it is more expensive.
Manual cranking is no problem anyway, unless you have a bad back or something, and is little effort when you consider how much easier it is then to park the van with the mover.
I have a manual Enduro, which works fine, and is brilliant when parking in a tight situation - also works like a brake to keep the van under control when descending a hill. The only problem is some slippage of the rollers on the tyres when negotiating a resistance.