There is nothing wrong with storing a car until you need it, as long as you can afford to maintain and insure it without creating any financial hardship. As an avid motorcyclist, I drive my car as little as possible, so I bought the following items to help keep my car ready for when I need it:
-A solar smart trickle charger - This one is large enough to keep my small Honda Civic battery charged, and by buying a USB adapter, I can use it to charge my cell phone when I am without electricity after a hurricane or tropical storm:
I put mine on my dashboard, so it's harder to steal, and run a wire out the passenger door seal (on a low point so water doesn't get in) to the battery when I connect it.
-Tire shine - usually found in the Armor All brand, but any brand will do. I use it to prevent dry rot. In your case, though, you might want to use both tire shine and tire covers since your car sits for longer periods than mine does.
-One last thing I recommend is using fuel stabilizer. If you can find it, I also recommend using ethanol-free fuel. I don't do these things with my car because my car almost never sits for more than a few weeks without getting fresh fuel, but I do use ethanol-free fuel in my motorcycles, because one is an older motorcycle, and the other one often sits for long periods.