If you want the hard badge, it's pritty simply. I got the badge on my third try, this is what your must do:
Day 1: Start with two squares on band and launcher, then with some lucky can you get about 900$
Day 2: Buy E-rockets and spend the rest of your money on band(or launcher)
Use E-rockets when you reach 0mph. With the money you get buy another E-rocket(if you don't have enough money spend your money on band(or launcher)
Day 3 and 4: Do the same as day 2
Day 5: maximize E-rockets(with three) and maximize band and spend the rest of your money on launch
If you did those things, the hard badge is pretty simply
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