I wanted to respond to
@onemorebike and the rest of this thread, but I wanted to actually do it first.
My 16-year old and I just swapped the wheels on my (smallish) A3 in under an hour, including a little time for me to fart around. He's had practice, but I made sure to do about half the work. (And I haven't done this entire job before.) That hour also included me getting the wheels out of the crawl space and putting the removed ones back into the crawl space, so about a half hour of time spent actually changing them.
Tires are rotated from front to back, on the same side, so be sure to label them when you remove the wheels. You may also want a breaker bar (I weigh 130 lbs, the socket wrench that comes with the car is under one foot long, and the lug nuts are supposed to be set for 120 foot-pounds, plus they might get a little rusty over a season, so you do the math) and you'll want a torque wrench so you can set the nuts correctly when the wheels go on.
It's also nice to do it the first time with someone who's done the job before, so they can show you stuff like how to kick the wheel loose after you've unscrewed and removed the nuts.
Edited to add: then I did the VW Eurovan on my own in just about an hour, plus a little time to find a white crayon (so I could write on the tires where the wheels came from -- the owner's manual shows the tire rotation pattern, but you need to know what position they were in last). Note to the wise: make sure the front wheels are straight before you start! Also, read the owner's manual -- it'll walk you through the process, including details such as what tightness to torque the lug nuts to.