if you'll drive it once/twice a month you don't need any special prep. maybe carwash every other week or so. or a double coat of wax every month and some tint on the windows.

you can try running the car once a week with aircon on so the a/c won't crack/leak from non-usage, but it's just a waste of fuel in my opinion.

issue jan yung interiors and paint. dust, acidrain, and UV rays can really mess up the paint and interiors.

the engine and electrical system wont be problem. basta walang ground, the battery can sit for months without being recharged. and when you start the car, the oil will still be fluid and the gasoline still flammable.