Talking to a Saturn mech when I was at lot looking for a car, he told
me 5 hrs is what it takes to change one. Just a data point.
It's not a quickie, but it's actually not that bad of a proceedure.
Basicaly, you pop the left tire / splash shield off, remove the crank
pulley (a pain), idlers (easy), tensioner (easy), water pump pulley (fun

Pop the negative off the battery (whoops, shoulda done this first
Remove the valve cover (T-40 torx, BTW), then wedge a piece of wood
under the dogbonme under the engine, pull the mount thingie off, then
the 4 8mm bolts on the front of the oil pan.
Then you remove a bunch of 10mm bolts and maybe an 8, and carefully pry
the cover off. Hey neat, there's the chain!
Pull the chain tensioner off, the tension shoe, the other shoe, note how
worn they are, get a new chain and maybe shoes, then retract the
tensioner, line everything up, and put the chain on.
Oh, then button it up. Use never-sieze on the water pump pulley bolts.
Trust me.
It's not *hard*. It takes forever and a few bolts are a ROYAL pain to
get at - a 1/4" drive air ratchet would make this a breeze.
But, I'd not worry, mine was still good at 220,000 miles, and if you
change your oil every 3,000 or so, yours will, too.