Been there, done that. Just about everything that has been stated above.
First off if you don't get the insurance, forget the business. I really never worried that much about the person who bought one of my bows. It was the nextdoor neighbor of the macho brother-in-law that was going to show everyone how strong he was. Idoits are the ones who will get you into trouble.
My arrow business started out fun and almost made me enough $$$ to somewhat live on. Then I tried adding in the bow building. It too started out fun, then the two business together became more than I wanted.
The biggest problem you will have is getting customers to understand you can't fill their order overnight. If your thinking about making totally custom per the customers request make sure you keep records of everything. Even the little things you might not think important when talking to the customer (est. start date, est. finish date, material to use, deposit amount, everything). Then make sure you go back over everything with them.
Afterwards, when it's all done, send a double copy of the paperwork to the customer (one for them and for them to sign one and mail back to you along with the deposit) before you except the order if they aren't present.
Again, make sure you get a signed contract and a deposit before work is started. As the ol' saying goes "in God we trust, all else must pay". Trust me, it prevents being stuck with a bow you really don't need or want without atleast getting alittle offset $$$.
I started out just building and selling what I felt looked good together. I didn't have to worry about hitting any certain weight or hoping the material I used was exactly what the customer wanted. About a year into it I started taking custom orders. That was my biggest mistake. Building and selling with what I had on hand was the easiest. If the customer liked what they saw, they could pay and walk off with bow in hand. If they didn't, all I had to hope for was that the next looker would like it.
You can add alittle extra jingle to the pocket by selling afew bows, but it can also turn into something that takes up all your free time and become the monster in the corner.
Troy