Does a rental include parking for the entire stay? If not, where could I park a car for a week that's somewhat reasonable, for under $200?

Parking is available at the hotel - valet or self park for an additional fee. Valet is $38.00 + tax per night Self Park is $34.00 + tax per night Other info on parking at Whistler can be found at https://www.whistler.com/getting-around/parking/