From someone who previously earned a lot of money and now had a family to support, this was incredibly hard. I almost gave up a few times. Actually, I try give up once or twice by finding a job, but circumstances conspired to make me keep going.
7 years on, and things are much better now, and the business is actually doing quite well, and is a nice lifestyle business.
Seriously, 25 is young. You have loads of time to fail. Better to do it now, then when you have family obligations. That's when things are very different.