I hear ya, man. I have been consistently undercharging in order to build my client base. For example, I just spent 11 hours on a full detail on an S500 AMG and will be spending 11-12 hours on a Range Rover from the same couple for a total of $375. Yea. I'm insane. But, in doing this, I have driven them away from their usual $100 detail they were used to and will be receiving referrals from them with friends and family with the same luxury type vehicles in the future. It's worth the loss of money for the time being in order to gain a large client base.
I was talking about this yesterday with a fellow detailer while I was doing the Range Rover. I have spent 8 hours on the interior alone. The big debate is whether to spend less time on the car b/c I'm charging so little and try to sell them for more, or to spend just as much time as I would normally and tell them the price will be more in the future. I think the latter should be the case b/c when the car is all done, no matter how much or little they paid, when it's seen on the street it needs to be perfect b/c that is my advertising. No one knows what they paid, just whether or not it looks great. This has been working out for me and I can't tell you how much business this produces.
As mentioned, it's extremely hard to pull customer's in CA b/c of the extremely cheap 'detail' shops. However, I think I've got a hook on it with my method. Hopefully it can work for someone else, too.