You are living large anyway dude. Parking can be had much cheaper than $500/mo. $30k year kindergarten is a waste of money. Summer house... WTF, why not 2 cars? Sorry, you sound a bit whipped
Anyway, an M3 cab is just not an ideal car to have if you only have one. You gotta have a sedan at least. Personally, I would never drive an SUV as a primary car. The wife's car, yes, but a minivan will never enter our driveway.