Medevac would be a sensible increment. Aerodyne Group cut their teeth with emergency medicines transport. So a Medevac service would be a logical progression. Air Taxis I think are Out Of Reach right now there's so much regulation and R&D expense. Heleport regulations just one example, gobs of planning and legal. Air Taxis would be a bit of a stretch right now I think but definitely Air Ambulance feels like a prudent project.
Anyway the chips fall. There is no better substitute than YOUR OWN DD Including mine...good luck!