Amen, Jim, and the others who've brought similar sentiments. At one of the first business classes I took when I started out on my own, one of the presenters said if he started to get more than 10% of his bids, he knew his prices were too low. A little extreme perhaps, but the best thing you can do for your Excedrin cabinet is to wrap your head around the fact that losing bids due to price is a great thing. I am too expensive for many people, but for MY customers/clients, I provide a tremendous value. I never like to think that I'm too expensive; you just have to find the right clients. I charge what I need to make - overhead, salary, and profit. Anything less and you're giving your valuable time away and undermining your skills.
Along the same lines, in the past when I've decided to bid low to get the job or after second guessing myself, without fail these jobs turn out to be the biggest losers. Either the job is more involved than I allowed for or the clients are more difficult, and usually both seem to go hand in hand. And work for friends and family - as much as I liked to help in the beginning, I really think its a bad idea. It clouds your business sense and while everything may go fine, the ingredients are certainly present for disastrous results. If anything, I limit my friends and family work to cash sidework. And $600 to build and install 2 maple cabinets - you're cheap, my friend. I'd charge $150 to just pull out my tools and install them, much less build them. JMO, at the very least I think you're being extremely fair. Just break it down; can you build these cabinets and install them in a day? 2 days? 3? I'm talking designing, building, spraying, hardware, scheduling the install, tools out, house protection, cleanup? When you really break it down I bet you're taking 4 days for this tiny project(32 hours plus/minus). $600/32 = $18.75/hour. Pretty cheap for a custom cabinet builder. Good luck, sorry for the ramble.