Rockymts, I wish I had answers. I wish there were more dorm seminaries and programs, especially in NY for girls. What’s needed is a supervised program for girls interested in a half day sem and afternoon vocational training, WITH A DORM.
The ones I know of:
Maalot Baltimore
Yavneh (no dorm but apartments, the girls are really happy from what I’ve heard)
Detroit Teacher’s Seminary
Montreal – Rabbi Aisenstark
Bais Yaakov Boro Park
Lakewood (two now?)
Chicago – Dr. Shkop, more of a college
And – while this should NOT be a consideration – rest assured that girls who go to these sems make excellent shidduchim, I know of quite a few recent ones.