Partial use deductibility

[Troy Longtine]

Here's my situation. I've currently only have two SFH, but plan to add a couple more this year. I've essentially only been doing this for a year, and things have been accumulating such as mowers, snowblowers, flooring, fixtures, paint, etc. The house I personally live in has an HOA that does not allow a shed. I've been diligently looking for a future rental that has a larger shed or pole barn to use for storage, but it is tough to find one that the numbers work (too expensive in the Minneapolis area).

I'd like to get my personal garage back, so I'm contemplating buying a garage condo.  Basically self-storage that you own the title to instead of paying rent.  Depending on size, it could be as much as 40% rental related items (biggest is a 5x10 enclosed trailer), and the remaining 60% would be personal (vehicles, boat, etc.).

Is what I've described deductible in some capacity?  Am I looking for trouble?  Is there a better way to accomplish this goal from a tax of business perspective?  

Appreciate any comments!

Thanks,

Troy