2007 Boxster - $6k worth of repairs

[lurky]

Hi I have a 2007 boxster... It was making a horrible noise last week so I took it to the Porsche dealership.. today I got the bad news..

Air/oil separator needs to be replaced (this is the primary issue)
Air/Oil separator replacement total $855.0
They said they also found 3 leaks:
Rear main seal $3000
transmission pan gasket $1250
drivers side cv shaft (axle?) $1400

So the horrible noise was due to the air oil separator, that has to be fixed.. but I think only one of the leaks was serious, the others are slow leaks..

One possibility, I usually get it worked on (brake pads) by a mechanic who works out of his garage, I put a call in to him, Im sure he would charge less than the dealership, ... do you know if any of these issues could be address by this type of guy? or would you need the apparatus they have in the shop to fix these?