if the education is comparable and it's what you (both parents) and she want i don't see an issue with it.
if all the kids won't be going to the same district i'de suggest first looking at the other district's calendar to compare with the one the rest of the kid's will be following. i currently deal with 2 different calendars, dd's school does'nt follow the calendar ds's does-and it can get tricky when one kid gets out certain days a time that does'nt allow me enough time to pick him up and get to the other one's school on time for that pick-up. it's a real p.i.t.a. when one has a 2 hour late start one day a month which means if i'm driving in order to get her brother to school on time she and i have to sit with her in the parking lot at the highschool for close to an hour and a half (not enough time to drop him off, come home and pick her up to drop off on time-and campus does'nt allow kids there before a designated time. it can get challenging when different schools do different vacations as well (they never have spring break the same week).
i'll pass on something i learned on the dis

that's been a godsend for us-look up your state's educational code and see what the laws/rules are on school transportation. when i did this i found out several things i never would have guessed our state requires-including if a student is granted the ability to attend a school outside their assigned district, the granting school HAS to provide them the same access to transportation other students IN that district are afforded. the district that is nearest us (but we're not in for some crazy mapping reason) has lots of kids near us attending it on out of district agreements and they interpret the law such that they send a bus out into our neighborhood to pick up those kids everyday. some districts interpret it to mean a parent can drop their kid off at the closest bus stop within their normal system-but depending on big a district is this can save miles and miles of commuting for the parent.
the real gem i learned from my legal search was that if a public school bus in our state passes any school (public or private) on it's regular route-a parent can arrange for their student who attends that school to ride the other school/district's bus and be picked up and dropped off (ds attends a private school that our district bus passess coming and going to the public school-it picks ds up at the regular school bus stop but stops at the entry to his private school every morning and afternoon just for him).
you might find that there's a transportation source that can make any decision to send her there easier to handle.