Yikes...how can you plan for something like that?......That's what I'm mostly concerned about ....getting someone hurt. You never know when a kid might come out to watch you work, you don't see them, and they get a little too close.
Depending what I hear from my insurance company next week, this may put an end to my desire to do custom work.
Well in short, you can't. You plan the best you can and get the insurance to cover what you will do, it's no different than regular life, as cutting edge's post demonstrates.
There is risk with owning a business, getting married, having children, driving your car to the grocery store and with everything you do every day. You want to minimize risk as best you can and roll the dice - being scared of what could happen shouldn't keep you from giving it a shot. I don't go to Web MD anymore, my finger can be hurting and within 15 mins of reading, I'm going to die in 6 months..
There are many ways to minimize your risk or exposure in business. First and foremost have the insurance coverage you need for the jobs you will be doing. At the end of the work day look around your job site and safe up any hazards you see. For me that means any open manholes are covered with plywood or stakes with caution tape. If you have a cut bank over 2' of depth either caution tape it or park your equipment around it with tape in between to keep someone from driving or walking off the edge. That works OK for a small site but a challenge for a larger site.
If you can block entry to the job site from vehicles and pedestrians that is the best option but rarely possible. A couple of cheap plastic signs warning "Danger construction area do not enter" also goes a long way to reduce risk.
These precautions are not only to protect the public but also yourself. Showing an effort to protect your job site from hazards to the public is helpful in the unfortunate event someone gets hurt on your job site or a "slip and fall" professional targets your site.
If one only contemplates how things could go wrong then there is no time to contemplate on how things can go right.