Yes, if purchased by tomorrow it would be a deduction for 2012. Actually, you couldn't fully deduct the entire purchase. You could only deduct it next year, as it loses value. It's deemed as equipment, and equipment can only be deducted like 10% a year, or 100% in 1 year. Depends on how you try to do it.
Anyway, if you don't pay taxes, what's the point? A "write off" is a tax deduction. You just said you don't pay taxes, so what would you be deducting?