The Mojave is based on the Chieftain, with several differences.
The Mojave has a greater wingspan, and is some 500Kgs heavier empty.
Same power as a standard cheiftain, but has about 75-100Kgs higher MTOW.
The aero-med equipment installed + full fuel + crew/nurse and it is not even close to a "lightly loaded twin".
Whilst the chieftain is difficult to fly asymetrically, the Mojave is that much more again.
Just the facts.