Get a trolley jack under the engine. Pump the engine up, slide/wiggle it onto the frame, reposition jack under engine outside the frame, then wiggle the engine onto the jack and roll the engine away. It's not that tricky, I can get the engine out in under an hour.. Putting it back in is the pig and can take me 3 or 4hours - reconnecting throttle cables, carb rubbers, working out all the cable and pipe routing, etc...
It's all worth it, for the satisfaction of firing the bike up for the first time once all the work is done.