As
@AVXL knows, I've been VP of a startup car dealership for the past 8 months. Now this operation is at a bit larger scale than most but the principles are still the same. This shyt ain't for everyone I'll tell you that much. Been pushed to my limits more times than I'm comfortable with. Some days you wonder if a normal job was worth it just for your sanity. My personal life has become non-existent.
If you aren't mentally tough and aren't prepared for crazy ass setbacks and circumstances, do not pass go. If you can stomach the pain and weather the storm, being an entrepreneur can be very rewarding both mentally and monetarily.
I wouldn't trade the experience for anything else though. I've learned a lot about myself and others in the process. You almost learn to laugh in the face of danger.