If the Baron is an option then take it, a real going places twin with decent payload. Flies very nicely and the engines have enough power that a failure can be easily managed with a wee bit of room for error. It is in a different class from the Duchess. Have flown one and seem to remember that 3 up with fuel was an issue. I prepare to be corrected but 4 up with full fuel in 500m? Sounds hairy if at all possible.