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I have an idea of how to get the hard badge. 1st day can get you $17 max so 3 days with no upgrades can get you a glider. As long as you have the right glider and rocket you can usually get the speed/height ingame achievements by literally rocketing upwards as soon as you leave the slope while the other two you get from playing the game properly lol. Either way In game achievements give money so getting the hard badge means focusing entirely on getting them. Give this a + if the idea helped you cut your record a bit.
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Your welcome:
http://www.kongregate.com/forums/3-general-gaming/topics/75702-learn-to-fly-in-13-days-a-detailed-guide