Slowrotor, i mean that the mass of the lifting system should be minimised for a given payload capability. The reason that all the wacky ideas out there, like ducted fan main rotors, have not got to market is because they are significantly more massive than a rotor. This nibbles into payload/fuel/range/etc...
I understand that you are trying to combine good range performance with VTOL at each end. The best solution is to copy the Joint Strike Fighter, which has similar objectives (albeit at much higher speeds). If you are not careful you will compromise the fixed wing efficiency.
What you need to clarify is the intended take-off and landing profiles. If a fault develops with the high diskloaded system the aircraft will fall horribly to the ground. The JSF is a military machine, and so is driven by mission requirements. Your civil machine will not have any autorotative capability - this means that the VTOL systems have to be ultra dependable/failsafe.