True craftsmen are far more rare than we want to believe. The clown carpenter that you had to deal with is unfortunately the norm. You will not recommend him, he should not try to hire you again, all is as it should be. I second the motion on time limits on quotes. The most important thing that I learned from having a bakery is that you must price each item based on your costs. When I do blacksmithing for hire I often charge a batch fee to cover start-up time, this allows me to charge less per piece once I am involved in production work. Then there are the pieces that I do once because it is fun but to do as production I would charge much more because it can be hard work with no fun involved. It all depends on the customer and the time I have to offer.
Keep up the good work!
Scott