How so? If I come into work (self employed) and have no Internet access I immediately start losing money (double if you count both people in my office). If I have to debug my own hardware, possibly drive to Staples to buy new hardware - I lose even more money, not to mention the cost of new hardware.
My only recourse is to eliminate some personal time with my family and replace with more business time to make up for the losses.
I don't see how this calculation makes buying my own hardware more economically attractive.