TD,my vote would be for a 18 hole exec.,bearing in mind that family golf includes juniors and seniors(demographics,green fees).A friend built 10 holes in arizona desert 3 yrs ago,and finally money is in place now for last 8 holes,all locals and snowbirds want 18 holes,not 9,even though yardage will only be 5000.Many 60 & 65 year old hubs and wives playing together,similar to my grandparents,me,aunties,uncles,etc playing together in 3 hrs as a kid,always 18 though,usually par 3"s.Maybe your client doesn't need green fee's now,but one day that course may need public golf,and 18 I believe always draws more,IMO....cheers Greg