So jhill44 has time to prepare a second bike between all the summer rides. :-)

I have a hybrid for a winter/rough weather bike with fenders and studded tires. It has a fifth the miles of my "summer" bike, but goes through components at the same rate because of salt and sand. Spreading miles over two bikes will make them both last longer and makes logistics easier, so I don't see having two bikes as "double the cost" in terms of dollars and time in maintenance, etc.