If you know what you're doing and what to expect, then you can get in to anything.

If you don't know what you're doing, then read up on it, talk to people who have done it, prepare yourself, and get to it!

I guess the most important thing to ask yourself before you start something is what you want out of it. If you buy a franchise, you'll end up with a job for a couple of years. If you start a company based on a trade or a profession, you most likely wont be able to create a system that will allow you to step back and let others manage it for you.

If you're after low investment, with a potential high return after 3-5 years of hard work then I would recommend network marketing.