You might be better off getting everyone one day tix and upgrading his to a 9 day when you get there, keeping all the other one day tix for future use (it has been posted that you can use this towards purchase/renewal of your next ap). This is especially true if you are talking about adding hopping or wp as you would be adding this for each and every ticket. I'm just assuming the daughter is a child but it really doesn't matter just changes the numbers similarly in both cases.
3-adult 3 day tix = 645ish
1 child 3 day tix = 181ish
Total OOP = 826,
Remaining future value 181,
Cost for husbands 9 days of base tickets= 645
3 adult 1 day tix=226ish
1 child 1 day tix = 64ish
Upgrade for 1 adult tix from 1 day to 9 day approx - 150ish
Total OOP = 440
Remaining future value = 214ish
Cost for husbands 9 days of base tickets = 237
So while purchasing 1 day tickets gives you the extra hassle of having to upgrade hubbs upon arrival
3 day tix nearly doubles your OOP
1 day tix leaves you a little more future value (3 one day tix instead of 1 three day tix)
3 day tix makes the actual 'cost' of your hubbs ticket more than an extra 400.