There are MPL cadets with less than 200 hours TOTAL time in the right hand seat of airliners.
At the moment, get 500 hours multi time rather than turbine single. Not having the multi time will put you out of the running for many jobs. This may not be true in five years time but for now take a Navajo over a Caravan. Having S/E turbine time is a small advantage, not having multi time is a huge disadvantage.