I did mine (at home) late last year. I bought; Original Alfa DMF, clutch kit, slave cylinder from Shop4parts for less than £500./
I had similar symptoms with bonus excessive vibration when operating the clutch. Turned out my release bearing had broken/snapped and was only supported on one side of the fork (hence vibration). The clutch and DMF were okay (120K miles) however I replaced it all as I was in there and prefer to replace items preventively and as 'complete services'. Besides, the labor alone would be worth more than the parts.
You will need more tools, ie. 36mm thin walled socket for the CV/hub nut, there are 22/23/24 nuts under there also, good circlip pliers, ball joint splitter, wooden dowel (etc) to centre align clutch plate
Wheels and half shafts out, both sides (drain box first!); 36mm, 13mm
Undo PS/Aircon pipes clip/bolted to RH subframe: 7mm?
Remove front exhaust sections: 13mm
Remove or just lower centre tunnel, you need it low at front to remove subframe bolts: 15 & 13mm
Undo Rear engine/gearbox to subframe mount (tight): lots
Subframe out (with lower wishbones, makes assembly easier later): lots
Battery and support frame out: 10mm
Slave cylinder removed from g/box (circlip pliers, I didn't need to disturb my hydraulics)
Braided gearbox ground strap off: 13mm?
Pop off gearbox cables from selector linkages on top gearbox (tight)
Remove starter motor: 13mm
Bellhousing bolts/nuts out: 17 or 19mm
I supported the engine with a crane from above, allowing me full clearance underneath to remove the box
Remove gearbox mount
Slide box off, don't let it hang on the input shaft, support if necessary.. It's heavy!
Clutch release bearing clips into the pressure plate tangs, needs to either pop off or slide out of clutch fork
Pressure plate is bolted to DMF with M7 RIBE bolts
DMF to crankshaft bolts (21mm) may need impact wrench
Check crank seal behind DMF for leaks/weeping (do you really want to do this again)
When refitting I supported the engine from underneath and used the engine crane to take weight of the g'box so I could wiggle it back on.
Took a few days
Another set of hands are invaluable
If you can afford to get it done, get it done
It's not complicated, any competent mechanic could do it.
I have a few pics in here >> http://www.ausalfa.com/viewtopic.php...11495&start=30