Rotating 5 tires, 4 active + spare

Hello, I am contemplating switching to beefier, winter rated ATs up here in Ontario Canada after a Forester suspension swap to my Impreza. I'd like to have a full sized spare so my question, is it realistic to have a 6 month, 5 tire rotation schedule so that they wear evenly?

Currently I run 4 all seasons and 4 winter tires that rotate every Oct/Nov and Apr/May.