Regular servicing for them, and that is if nothing is wrong, is about $1000. And they are notoriously unreliable. Older ones have trouble with electrics, rockers and rusting. They swear the new ones are better - but it seems that they say that for every new model until something comes up.
Take a look here for part prices before you save up to buy one:
Ducati OEM Parts. I think you'll find prices on parts a bit higher than on a japanese bike, and you'll have a bigger need for them.
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"Improvement makes straight roads, but the crooked roads without improvement, are roads of genius." — William Blake