about to get '03 X5, how hard is timing chain/guide?

[acannell]

its actually not for me, but my parents

they are about to buy a 2003 X5 4.4 V8 with 106,000 miles for about $9000

the interior is in flawless condition, and it drives with no anomalies and seems to accelerate hard. its also got new tires. i think overall its a fair price.

ive done lots of engine rebuilding and pretty much every mechanical procedure imaginable on an old chrysler 4 cylinder, but i have no idea what to expect on the X5.

from what i've read it seems like the timing chain/timing guide are the timebomb of choice for this engine (M62TUB44), so I've done a minor amount of research and it looks like one can rent the tools for $75 and get all the parts for about $600. is that realistic?

are there any X5-specific procedures for the timing chain/guide replacement out there? seems like all i can find are just the engine, or sedans.

if anyones done this on an X5 id really like to hear your opinion on how it went.

are there any other significant time bombs I should be aware of on this vehicle?

thanks for any help!