Will the vehicle be inside a garage?
You’ll be fine, as far as the battery goes. I would personally prefer the battery maintainer over the solar charger.
I’ve had cars sit several months at a time, without a trickle charger hooked up, and experienced no problems starting the engine
Bear in mind, I live in Los Angeles, and the vehicles I’m referring to were very basic, with extremely low parasitic draw
You might have slight valve clatter immediately after start-up. If so, it should go away rather quickly, provided your valve train is in good shape
I even know some guys that prefer to store their vehicle on jack stands, but I don’t know if you want to go to such lengths