It sounds like a very viable option.
Seminaries everywhere are expensive, even in the states if parents have to send their kids out of town and just miss qualifying for gov’t aid. (I heard some people explaining how Israeli seminaries cost next to nothing for them because of the various grants specifically for Israeli sems, they qualify for gov’t aid and even insurance help, etc.) Sem is a worthwhile investment IMO and I think your daughter will gain immeasurably. As I said, this seems like a fine option for her.
Now about coming home 4x a year: do ALL the girls really do that? Do some stay, and spend the time with friends’ families? I have a hunch more than a few girls do and they don’t feel at all nebby about that.
Hatzlacha!