Ideally you want to be under your husband's sponsorship since it gives you the most flexibility. However, if the school is offering you their sponsorship I wonder if it means they will not help you with your husband sponsoring you. Is he making over 10,000 QR month? Why don't you call/email the HR of the school to ask. I am a little puzzled as to why they would offer you their sponsorship. Are you working for them? And you know what, why don't you ask this on Expatwoman.com as well. I haven't heard of this and I'd like more opinions.
Mandi