will you pull the trigger already? Many *affordable* Ducs out there...both older 2v and 4v.
I'm not sure of the parts support on Guzzi? Is it ok? I know they reliable, never requiring all but normal service parts. Is the oil filter still a wacky design and location on the Guzzi's...or did they finally upgrade to easy access spin-ons from the factory?
To be honest, Ducati parts availability not bad at all, I purchase from Ducati Omaha online, I have a PDF parts book for the '95, they have online for the '07...I pick my own part numbers and find availability not bad, an occasional discontinued part on the older model...but nothing has stuck me yet in my from new, 24 year ownership. Certainly not living up to the legend of impossible, terrible parts availability that folks bash the Ducati brand with.
Actually, aside from normal service parts and a broken shift return spring (bought online, cheap, in my hands within a couple of days) ...the 900SS is so reliable..I've never needed "hard parts" at all, NO failures whatsoever. Belts, oil filters, plugs/wires, tires, chains, sprockets..oh my...just the usual stuff. Add EMS valve shims (sold individual or in kit) and you are golden. Convert to MBP collets to extend the need for shim changes. After 15,000 the desmo valve train stabilizes, converting the collets moreso.
An upgrade to a Mosfet rr may be justified, depending on model. At 18 years old...I proactively changed my still working, but hot old shunt rr to the FH010 Zx1000 Mosfet based on age. Now going into its 9th season, though I created a grounding issue years ago...long resolved and solid as a rock since.
will be able to comment further on hard parts availability as his restoration will have deeper requirements going forward, no doubt.
There's a massive used parts market out there, too.
Just .02 cents and heavily biased opinion from a satisfied, long time multiple Ducati owner.