Last I checked FRP charged $150 to split a kdx case..and that is with the engine out of the frame. I don't know if that includes putting it back together.
L30 is cheap!
MotionPro makes a tool for splitting bike cases. Seems it's around $150. Like Rethnal said..it's cheaper to have it done unless you are going to do it a few times.
Riders have also used other pullers..basic gear, balancer and wheel.
It's not so much the splitting but the putting back together that I'd be worried about. What are you going to do once it's in pieces? It's not only a matter of doing what you should when you're in there (crank seals/bearings, tranny seals/bearings etc) but doing it right. In some cases the depth to which the seals are driven is critical. A bit too far and you're in trouble.
Good luck. If you end up doing it yourself, post a tutorial for us!