a VLJ might possibly work is if the operation was tacked on to an existing operation so the overhead is not solely borne by the VLJ operation
A mixed size fleet is the solution
Both absolutely right...theres always an inherent risk in putting your faith into one new unproven type of aircraft and one way to reduce this is, perhaps, to make it part of wider proven fleet.
However to say that this forum is about some people grinding axes as suitcaseman suggest is a little strong. Its a relatively new sector and there is obviously still question marks to its viability - either as a standalone business or as part of a broader offer.