clutch is going .. going ..

the clutch on my 1999 540i with 130K miles has started to slip .. it was fine last week although there has been a squeek sound when disengaging the clutch (press clutch) for a few months now

mechanic told me its fine until it starts to slip

today i noticed a few occassions of pressing on accelerator, and revs zoom and there is a second or two delay in engaging and accelerating.

so 1. how many weeks/month can i expect to go until it is unusable
2. what can i do to delay having to replace clutch/flywheel (i'd like to get 2/3 mos out of it)
3. anyone in DC/MD/VA who has experience doing clutch jobs on BMWs? its an old car and I'd rather not spend $2K @ a shop

First of all of you don't want to damage your flywheel DO NOT drive the car hard. No full throttle or high rpm shifts. I have seen many damaged flywheels because of this. If you be easy on it the flywheel can be re-used, that in itself will save you allot of money.