You don't pay $200 every time. I'm not even sure how you'd come to this conclusion.
I heard online from a good photographer that it isn't the best to calibrate your monitor (cuz of price) unless you are printing...the customer doesn't have a calibrated monitor :P
You either didn't understand, or the person saying this is not very bright.
For a screen calibration system, like a Spyder, you pay for the device, and then can use it as much as you want.
The flipside of your above statement... Yes. The customer likely doesn't have a calibrated display. So, why do you care if it's too warm or too cool on your also non-calibrated displays?
Also.. you have multiple displays and don't have the cash for a calibrator?
Canon 5dmkIII, Sigma 15mm f/2.8FE; 35mm f/1.4; Canon EF70-200 f/2.8L IS II; --- YN560 x 7
I'm not a professional photographer, and I don't want to be.