Tyler is right. Unless you make money chasing, which is very difficult, you can only take deductions for 3 years max.
I am trying it now with an honest intention to make money from a DVD I'm going to attempt to put out and sell locally in retail outlets as well as the occasional stock video / TV news video sale. I have gone part time with my day job to 'chase' and do this, and so far it is working OK, but it is not easy at all.
Starting a business is pretty complicated, especially if you live inside the boundaries of a city or large town. Lots of government people get a piece of your income and because of this, it is hard to make a profit if you're not making much to begin with. You have to deal with federal, state and local taxes. There are city B&O taxes and county property taxes on your equipment. It is pretty overwhelming when you do it for the first time and I am slowly figuring everything out.
I don't know if I will end up getting to do this after the IRS' three year timeline, if not I've got an employer that graciously will take me back full-time. I have not made a profit so far in two years, but most of that is due to first-time equipment purchases. Travel expenses (gas/vehicle wear) are a killer nowadays.
One thing is for sure is that if I wasn't passionate about the weather, I would never do this. There are much more reliable and easier ways to make money out there. You're probably better off getting a nice day job that allows you enough vacation time and pays you enough so you can afford the gear/travel expenses to chase like you want to.
Also, being single helps. If I ever get married, this 'chasing life' will definately have to end