If you really want to attempt this, the correct approach would be to approach the problem from the perspective that gravity is the force you have to defeat. Fin

If you really want to attempt this, the correct approach would be to approach the problem from the perspective that gravity is the force you have to defeat. Find a way to reduce this force significantly and you may find a cheap solution. For example, magnets defeat this force. Look for things that can work against gravity even in the absence of air.