To help him feel useful, let your husband know he can still rotate the tires, refill the windshield washer fluid, maybe RainX the windows, and in a year or two change the cabin air filter. Hopefully won't need anything else for years. Eventually the brake and cooling fluid should be refreshed. Even the brake pads last a really long time if you drive nice as most of the braking is regenerative (putting that otherwise lost energy back in the battery). I've REALLY learned to appreciate not having to waste half a day at the dealer every 6-12 months.