It took me longer than that to do mine although i've been repainting bits and renewing and futtering about ...
I also discovered that my flywheel had a 17thou channel in it which needed to be smoothed out.
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And then the gearbox needed a clean up prior to refuitting ...
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And I need a new handbrake cable and the shoes were a bit worn/oily ...
Saying that
@Tirran and I changed his clutch (200tdi - LT77) by removing and replacing the engine in around 6 hours, but that didn't include refitting the floors and carpets etc etc.
If time is a constraint then spend the £600 and get someone else to do it.
If you want to look at everything and have the time, it's not that difficult/complex a job.
And ... they are heavy items (transfer and gear boxes) so it's really a 2 man job ...