Don't half-ass it. If you're going to spend the money modifying your car, do it right else continue saving till you can. In an ideal situation, lowering the car would only knock out your camber specs but in reality since you will be unbolting the hub to get to the strut, chances are you'll be introducing some (minor) changes to toe settings. Will the car be undriveable afterwards? No, but you may experience some unnecessary tire wear (minor again) if the toe is off. And don't look at the alignment as being an expense, look at it as being a performance enhancement. You'll have the ability to set a more aggressive tune and get away from the stock settings.