The camera calibration is basically the same that comes with the color checker passport. Phil, check out that product and you will get a better idea what is involved with calibrating a camera. I have seen the Passport for around $49.00 USD at various sites for short time sales. The ColorMunki Photo is worth having for printer profiles, but if you are wanting one for profiling a camera, just getting the ColorMuski Display or a Spyder 4 or 5 and Passport (on sale) would be the cheaper option.
I have not bought a printer profiler but if I printed every day, I definitely would. If printing every day the savings by using quality third party inks would be substantial. There are many excellent third party ink suppliers, but if I used third party inks, I would only feel comfortable with profiles I have created myself. In my opinion the reason to have a ColorMuski Photo or like products to calibrate printers is most needed if there is a need to represent colors highly accurate such as brochures for selling clothing, etc. Most Lightroom Profiles from the manufacturers are close enough for regular photographs. Therefore, in my opinion unless you need to document colors very accurately (not just look great) or are using third party inks, the average person probably only needs a display calibrator not the full system.