33, I'm with you on the "no house = sorority will die" idea. I just can't fathom it. When I went through rush at my school, only 1 sorority (out of 5) had a house and they had just gotten it. 2 more sororities have since gotten houses, 1 is looking, and the other one (mine) isn't. (Of course, I went to school in the Northeast, which is a different animal...)
I wonder if it would be possible to set aside a floor or two of a dorm for a new sorority to occupy for a year or two? PNM's would simply be told that the sorority had just recently colonized and would probably have a house by the time they're juniors. (And if the colony hadn't been chartered yet, they could also be sold on how interesting it is to be a chapter founder
)
The new sorority might not be able to get their numbers quite so high without a house, but if they got houses within a couple of years, in the long run that wouldn't hurt them.