Welcome aboard Simon.
You've made a wise choice in buying a complete bike, basket cases in boxes always end up in tears!
Couple of tips for you if I may, 1/ Take a million photos. 2/ As you dismantle, put everything in plastic tubs (never cardboard boxes) and small parts in zip lock bags with names on them. 3/ Ask any Q about the resto on this forum, we will help. 4/ Don't set a budget because that won't work
. 5/ Priory Magnetos is 1st choice for new parts. 6/ Enjoy the ride.
Cheers from Tomcat, from Down Under.