A plane motorcycle can fly but would probably be impractical for other things and you would need a pilots license and all of that. If the wings folded they would probably still take up quite a bit of space leaving no room for motorcycle panniers or carrying stuff and it would probably be ridiculously heavy

An e-bike is a bicycle that gives you assistance while you pedal. I can ride it most places and does not within its usage have an exceptional negative effect on the planet like a gas powered vehicle would (granted yes there are issues in production of most vehicles and you can charge from non-renewable sources) If I run out of battery I can still pedal it with a motorcycle I cannot pedal it at any point and it will generally weigh quite a bit more probably well over the weight of all of my bicycles combined including my e-bikes and I have about 14 bikes.

A quality bicycle would not be astronomical if it is well supported and made with quality parts all of which will last a long time. The low initial cost stuff is where I would say the prices get astronomical.