Actually IMHO, the difficulty with any of these things are tracking the right metrics. Particularly for "hobby" style businesses. You find out at the end of the

Actually IMHO, the difficulty with any of these things are tracking the right metrics. Particularly for "hobby" style businesses. You find out at the end of the year trying to avoid paying a bunch of taxes on something that didn't really make any money, that you mixed up or failed to compute your vehicle mileage correctly (or whatever). So, having an accountant handling all the details, in the en puts the information at your fingertips that otherwise you have to scrape out of the box of receipts/etc. The tax filing parts are easy.