Joseph, noi one person has that influence. but a cadre of concerned baalei batim forming a board, or its own board, can do it.
BYoBP, according to the article in Hamodia, now serves litvishe Jews in Flatbush as well, along with other areas. Its local litvish clientele is definitely shrinking though, as BP gets more farstreimeled. A few years ago they had 2500 students. Now they have 2100, a loss of 400 students. Something must be done. but blindly giving money is not a solution either. There is a quote in last week’s Yated from Reb Moshe ZT”L that any school which doesn’t open up its books is chashud on gezelah. The quote isn’t sourced, but it does make sense. Sometimes you must amputate a finger to save a person. Save the Beis Yaakov, and help them survive long-term.