You could spend 5 days in Vancouver and not see every thing.
A visit to Stanley Park could take all day . You could take a day trip
to Victoria (better to overnight) .
Sept is usually good weather with warm days and cool nights.
There are hotels in the downtown section of Vancouver to cover all budgets.
There are also B&B (bed and Breakfast's) in many parts of Vancouver.
SS Ithaca , Volendam , Mariner of the Seas (x2) , Veendam , Coral Princess , Island Princess (x3) , Emerald Princess,Sapphire Sapphire (x3),Diamond Princess