There's a couple of things to think about here. First, there isn't really anything for parked car insurance. What you may be thinking about is storage insurance.
This coverage isn't provided by every company and usually only available if you have another vehicle insurance for at least your state's minimum liability limits. For this coverage, you would only have comprehensive coverage. Because of this, you actually wouldn't be compliant in your state's insurance regulations and thus wouldn't get plates. The only way to get plates is to have your state's minimum insurance requires and send proof to your DMV. The average cost of car insurance in Arizona
is $637 per year. I would recommend either getting insurance on the vehicle to get the tags, find a different place to park the vehicle (such as a friend or relative's home) or speak to the complex manager. You might find a cheaper solution there.