While tossing around crazy ideas, how about listing the Spark EV on a peer-to-peer rental site (i.e. turo.com)? If that generates enough revenue, it might even pay for some kind of garage space, even if just a storage space with 120v electricity, near the airport where it would be a short cab/uber/lyft or perhaps even commuter bus or train ride to the car. I am a Minnesota native and have a lot of relatives there. I might just be one of your customers!