@Mark - Yes, that was my mistake in my write-up, I did run "make download-qt5".
@Tony - Yes, I realized late last night that I could check the src/*.mk files to see what the accepted checksums were... not sure why I didn't think of that earlier. I have re-downloaded all of the packages and the only one that is having an issue now is lcms2. I grabbed it from the approved website (sourceforge), but it seems that the checksums still aren't matching. To bring my files from the networked computer to the non-networked, I burn the packages to a CD and bring that over. The burning process does encrypt the files, so that could be one potential point of failure, though I really hope that's not the case... I have not yet confirmed a delta between the checksum pre-burned to CD and once it has been removed from the CD. I will hopefully be able to do that today. I'll try to update this thread once I figure it out for archival purposes.
-Seth