first off, I think you are getting confused on beard "hairs" and beard "grafts". these are very different.
second off, you may not be the "average man"
third off, if everyone had 30k or even 5k beard grafts to use, we would see a lot more use of the beard in hair transplants.
You may be able to get upwards to 1000 grafts out of your beard to use for your scalp if you want to totally deplete your beard. But if you want to leave some beard for the future and facial hair, I think you're looking at 500 grafts like I originally stated. Unless you post more pictures indicating a fuller beard