I have a friend who does this with her 2 oldest kids. But I do wonder sometimes if she does it for the kids, or for the convenience of only having them week on, week off.
Hers are 8 & I think 14 or 15. It started when the younger one weaned at 3 or 4.

Another friend is every second weekend & every Tuesday. But if you're wanting to move away, how would you do it with school etc? Maybe that's something you need to consider now, so they can keep their routine & stability as they get older.