That is beautiful. I've earmarked a couple of jumpers like that myself but it would probs take me years to complete.
I intend to try to knit the main body of the sweater on my machine and then hand knit the yoke, not tried this before so it is definitely an experiment.
I have ordered the yarn from Jamieson and smith, the other risk factor in wether it works or not is I have ordered the main colour on cone and the others is balls, as the cones are oiled and the balls not, I may need to make some adjustments as I knit.