Yup. I agree with this completely.
I look at it this way. My DD will be in school another 9 years (plus hopefully college). School pics for those 9 years will probably only run me about $500 even if there is a 10% price hike each year, which there generally isn't. I could spend $1000 EASILY on a lighting setup. Since my DD would most likely be the only one I could drag in front of the camera, that would not be worth it to me. However, if I decide that I like to do portraits at some time and there is the possibility of someone paying me to do them, well, I may just change my mind on the cost effectiveness.
At this point though, I am just happy for DVC Jen as I know that she has wanted this type of setup for some time now. I can't wait to see how well they work for you Jen! Here's hoping that it is an easy learning curve for you!