On #2 - maybe. Maybe he wants a national title. At one point I thought Saban would want a Super Bowl as well and his competitive nature would get the best of him. That seems to have worked out well for Alabama.
On #3 Stephen Ross is not forking over a significant sum of money to hire him at Michigan only to turn around and hire him away the next year to Miami.
On #5 Hoke got about $3 million per for his assistants. Harbaugh is supposedly getting $5 million per for his assistants.