I'm not sure what your decision is but I wholeheartedly agree that if that is what you want to get your sister then do it. It's your money to spend how you see fit and this is a generous gift that she will always look back on fondly as a reward for her hard work and the thoughtful gesture that went into it from you.
Congrats to your sister on an exciting achievement.
Congrats to your sister on an exciting achievement.
