Ok, I understand. I'm not sure I agree with "The PC seems to have decent cutting power" because hard clears like GM just laugh at it, but in the past year with the availability of compounds like M105 and small pads like PFW, perhaps you really can do timely defect correction with a PC. There is still the issue that it may require a lot more time to do a car with smaller pads, which is an issue in a professional setting.
Keep in mind the Flex is less "flexible" because of the fixed backing plate, so it's more difficult to use different sized pads.
There is also the G110 option which is a bit more powerful than the PC, although I'm not sure if they are still having reliability issues (of course the Flex is having some too).
As noted, the Flex is pricey. As I mentioned above, perhaps in the last year or so we've achieved a paradigm shift where it's possible to do correction with a PC without any disclaimers. What is it that you want to do in the spring? Quit your job and go on your own? Do side jobs? Friends and family?