years ago when I was doing my PPL(H), I had the opportunity to land a 206 on a dolly a few times. Nearly always a fair tail wind, near hangars and a very narrow dolly. I can't put into words how stressful I found it. Used to get very tense on the controls and sweat like hell. My instructor used to talk me down and wouldn't follow through on the controls. Said I could manage without his help. Not something I liked at all, then, a couple of years ago was doing a survey job in a 206, having to land on a raised wooden platform due to ground conditions being less than perfect. Platform was 'just' the width of the skids. I landed and one of the skids was ever so slightly off to one side, and of course it caught as I tried to lift and re-position. Bloody x-winds!!
About as close as i've come to rolling one over and it happens so so quickly. Only a bruised ego and a new pair of shorts required that time!
Surely if you can afford a helicopter, you can afford a heli-mover??
ps, agree that proper helicopters have wheels!!
