I agree, that for some of these people who only upgrade once every 7-10
years that it might be best to farm this out. Of course, if they think
they'd rather spend the money on getting an HMC versus paying someone to
farm this out to, that's their choice.
If they want to tackle it themselves the big clue is IBM calls this a data
migration and documents the process of moving from one system running V5R4
to a new system running 7.1 at