Sounds like a terrible business to get into. Which begs the question: are you doing this for money, or are you doing this because you find it fun?
Sometimes, the two are not the same. When they aren't the same, you should go out and try and find something that is both fun and rewarding for you.
Running into a saturated market, losing money, dealing with DDOS-happy griefers immature ungrateful *wipes seems like a terrible job to get yourself into. Sure, we all just want to play Minecraft, but your customers are toxic, and dealing with the politics is crap, and now I learn that its unprofitable to boot.
So if you aren't having fun and you aren't making money... there's something that needs to change. I can't think of any other community where griefers, trolls, and DDOS attacks are as big of a problem. It really seems like a Minecraft-specific phenomenon.
(outside of MMORPGs, where the competitive play between clans sometimes leads to Out-of-character real life DDOS attacks)