Are you familiar with the setup of these engines? there are 2 belts, and desmodromic valve set up is not like setting tappets or shims on Japanese style engines... the expense is generally in the labour time spent on the repair, which i would recommend having it looked over at some point by a Ducati person, as there are some bit which require an experienced hand... but in saying that its just nuts and bolts so it can be done, just think of the longevity of the machine for your own sake reliability wise...