Really, with just music files on from known good sources in an already fixed format - I'm seeing them put it in a caddy, rip the files dumped from their app via antivirus scrubbers to a network drive or other local HDD and then [unfortunatley] chuck it in the bin. Would that be too hard?
They'd perhaps need an intern for that as a short term project. After the initial c.900000 music file (100,000 albums) then uploading would probably be more feasible.
900000 tracks of 5MB (assuming lossy compression) at 10Mbps would take over 40 days of 24-7 uploading (not allowing for errors and outages and such). 10Mbps was still quite fast for uploads in 2003 I think (faster than the current average in the US according to DSLreports). S-ATA RAID0 write bandwidth was about 34MBps at the time, roughly 27 times faster than the network in-flow; I'll assume read was faster and so this is the limit for disk-to-disk transfer. Assuming shipping took a couple of days you'd expect to finish the transfer a month quicker.
I'd be interested in how it would be cheaper for Apple for the initial round to accept uploads only, especially given this retards the lead time (to selling the tracks) by a month or more.