I don't disagree with you at all on the benefits of having it in a fully enclosed hangar, but I'm on the verge of selling if I can't make it somewhat more affordable (or find a co-owner). To break my math down a bit more, I have figured up the hourly costs at my average flying per year. If I downgrade to a covered tie-down, the cost difference will make flying 70 hours next year the same cost as flying 40 hours this past year. That's how I've tried to approach ownership costs (flying time).
Fun note on keeping it cleaner; Signature somehow constantly blows dust and grit all into the hangars (even when the doors are closed). I walked into the hangar a few weeks ago and my airplane was covered in dirt and grit from them blowing the apron off and into the hangars when they patched the cracks in the pavement.