If you want a real neighborhood dinner and a lower price than the Findel airport hotels. Cents has decent budget options with free parking and a 10-minute bus to the terminal. Airport hotels are pricier and characterless.
Not sensibly — it's 40+ minutes with a valley descent and climb. Take the tram from Cents-Hamm. If you insist on walking, the route down through Clausen is scenic but requires reasonable fitness for the return.
Live prices for every hotel and inn in the area — free cancellation, updated daily.