Congratulations! Enjoy making wonderful memories.
As for bikes, I bought two used bikes from one of the bike rental companies here and they've been fine. They were selling the used bikes in the fall after the peak season. Not fancy at all (a nice sunny yellow color), and someday we'll paint them up again and put SoWal stickers on them. I figured the used bike places have the kinds of bikes that can sit outside and withstand the weather (though it's better to cover them).