Helinut,
It seems you are an advocate of hovering low "in case the engine fails."
Listen to Frank Robinson - he tells people that hovering higher is safer than hovering lower. He has never lost a helicopter from an engine failure while hovering higher, but there are hundreds of losses from people hovering too low, catching a skid on the ground and rolling over.
Play the odds: the chances of an engine failure in the high hover are very low, but the chance of stuffing up a low hover (with engine running) are very high.