These are the types of things to find out before one applies ED. I also would be interested in knowing what prestigious state uni your D was accepted to, and what her intended major is.
There’s really no choice to be made, but IMO BU is not worth 3x the price if we are talking UVA or UMich, and probably some others, depending on major. Hopefully BU is affordable without any loans, or just the $27K in the Federal Direct Student loans.