I am with Clare Prop and Dehav .
I have never been able to get anywhere near 100 or 55(?)hours.
250 hours much closer to the mark but, what do I ( Nearly 40 years in the industry)and the others know ?
If I did my own maint , didn't insure or fix anything that fell off, ran the engine/prop until out of hours , I could say that my minimum hours would be zero ( just the cost of fuel to fly).
Of course, I know that I would be fooling myself and was just eating into the value of the plane.