Well put Dusan. Stan if it where possible to construct a vtol aircraft using the Tesla hardware Elon would have done it already. The motors are not meant for continuous high output. Perhaps they could be, but the liquid cooling system they used would have to be expanded, adding weight. Even if the aircraft could be constructed for for $50,000 in materials you would still have all the overhead (labor, cost of production facility to make payments on, utilities, insurance of various types). I just don't see how you can use the two most expensive components form a $100,000 car (the motor and battery are over 15k a piece for the top end model s) and say it will only cost 50k, have you bothered to price out good carbon fiber or avionics? Sorry if I offend but I have a real aversion to BS, like Glenn Martin Claiming 4 minutes of instruction is all anyone ever needs to use his jetpack. What about altitude density, cross winds, weather, radio communications, or are we to assume that you must use a jetpack in a vacuum, removed from the rest of the world?