Delta with separate hotend and bowden mechanisms?

So I've built a Prusa I3 kit and will be keeping it for some time. But in the back of my mind I've been dreaming about designing and building my own largish delta. The big advantage is a stationary platform with a very low moving mass using a bowden setup (are their any non bowden deltas?). The disadvantage is the accuracy out at the edges of the build volume and the drawbacks of long bowden tubes. I've seen a few guys get the bowden hardware closer to the hotend by suspending it from bungy cords connected to the carriages. This made me think if you weren't concerned about the extra cost, make a delta with a completely separate delta mechanism with it's motors hooked up in parallel with the hotend mechanism offset from each other as closely as you could. Then you could make the bowden tube very short while still having no effect on the movement of the hotend.

Crazy, intriguing, big problem I'm not seeing that makes it impossible?