In theory I could drive the car into my garage and leave a trickle charger on, but ideally I would need to convert the double doors to a single electric door. Might be worth it. (Not the money saving, but just knowing the car will always start)
To be honest, while it's nice that the car will start, not murdering the battery and knowing the car would start with a bit of a charge or a simple jump was really what I'm after. Replacement batteries aren't cheap and a bad battery will fail you at the most inconvenient of times.