So, what you are really saying here is that a scaled-down Caravan is what's needed, right? Btw, there are a few 210 turbine conversions around, bit pricey though. I guess one of the reasons of the enduring popularity of the 210s is just that - price. They are relatively cheap, fast and not too thirsty. To the best of my knowledge there is nothing comparable out there (other than perhaps the 206/207).