Hmm... last time this came up with my tax preparer/bookeeper, she told me that the IRS considered any small business that loses money for more than 3 years a hobby. Especially if it is not your livelihood, not your job, not the source of income that pays your bills, but more just a way to write off your purchases while building up your tool collection.
Imagine this: Hey, I bought all those tools because I was gonna be a full time woodworker. Then the old lady got pregnant got pregnant again, and we needed braces for our oldest, so it just didn't work out. Thanks for letting me have all those exemptions and deduction; it worked out great! Especially since I never really got around to starting the biz!
Anyone can tell you anything. I have been self employed for about 25 years and many of my fellow contractors have been pretty damn smarmy until their first, full audit. Nothing like watching an audit agent (usually someone that has college level bookkeeping and couldn't pass the license requirements for CPA exams) simply disallow a legitimate dedcution out of hand. It will make your eyeballs burst from the heavy handed bullying.
I have also been audited by some really nice, knowledgeable people that don't even finish the review. Things look good, professionally prepared, and they were just checking to make sure we were doing the things we needed to do.
STAY AWAY from the bar stool experts, the know it alls that read the business section, and the guys that feel like they are pretty slick at preparing their own returns. Not getting caught by the IRS doesn't mean you are doing anything at all right. It just means you haven't been caught. No matter who does your taxes, NO return will stand a full audit if you get a jerk auditor.
Best advice you have gotten here: go see a professional, someone that specializes in construction. They will know about all the pitfalls that beginning contractors/woodworkers fall into.
Robert