Comment by artmageddon

I have; it can be tough especially if the client is a demanding one. For me it was more like 10-15 hrs/week, but sometimes it'd easily be 30 hours if things were broken or some new deliverable came up. Luckily my wife had her own thing going on with her Ph.D at the time so she was super supportive and understanding... it also helped that the work covered half the cost of a new car we needed part way through the project.