The difference is working your butt off the rest of your life for your boss, or being that boss. If you drop out of running for college, you can kiss off having a better paying job that won't destroy your body. I have started back to college myself as I am tired of being the who sweats it out all day long.
£30000-£35000 = $65-$75K here. You won't get that on a high school education. I make decent money for my area, but I am not in that ballpark.