Confirming this, Apple routers don't have QoS. OP might just want to pick up a cheap used WRT54G and install DDWRT or Tomato on it, those both have QoS.

I'm pretty sure this isn't possible with just an Airport. You may be able to put some kind of extra router behind it to manage QoS.

I want to provide free internet to a neighbor, but I also need to make sure they don't hog all my bandwidth.  I've looked all around my airport utility and I've googled, can't find a way to limit the bandwidth on the guest account (or any other).

Is there a solution that doesn't require buying a new non-apple router?

If a non-apple router is required, what brand/model would you recommend?

Thanks

Bandwidth Limited Account with Airport?