[Warewolf-ESB]

I've never done a PhD but I have (and do) run a start up. To do it successfully you will more than likely spend 90% of your waking hours obsessing, thinking, working, planning and doing stuff that your start up needs. I can't imaging having anything else big, like a PhD to focus on at the same time. There is also a good chance that your family will be missing out on time with you, because of the above. While it is VERY fulfilling, and certainly has the ability to bring in rewards far bigger than a "job", think about it carefully. You need to really want this, it is not always easy and can be risky. Good luck!