It will be a short war as Putey has about enough ruples to sustain a 30 day war with the Ukraine before going broke.
He wants the Crimea and they want to be with Russia. Thats likely how it will end up. If Putin tries to take over the whole Ukraine he’s going to get to watch his precious pipeline start exploding like popcorn. The Ukrainian resistance will blow the stew out of it. A war of attrition will break Russia. They are hurting for money right now.
All the more reason to stay the hell out of it.