Well to get the oil pan off you will have to do quite a bit of work. Thats why it is so expensive.
You will need to drop the K-member a bit and un-bolt the motor mounts. Pull the engine upward while the K-member drops just enough so you can pull the oil pan off.
Then you have to drill out a few rivets and then just replace it with a new $40 gasket
I would say a good 6hr job.