Dusty is quite right.
It is easy to look at an average roster and think 'I can cope with that' but can you (and your family) cope with that type of roster each and every month?
It doesn't just place a strain on your body. It will place a strain on your marriage too. Imagine being on a day off between trips and having to tell your family that you are just too tired to see the play at your son's school in which he has a lead role, or too tired to take your wife out for dinner as previously promised.
Don't just think about if you can cope but also if your family can cope with what it will do to you and the effects of that.