you can bring your wife on hotel visa as well as business visit too. Hotel provide you , tourist visa and it is not renewable. Some hotels will force to stay the same hotel. and you want to pay the room rent even if you are not stay there.

Other option is "Business visit" for one month and it is renewable for another two months. For this you want give the some certificates - (graduation or diploma etc..)

Why you are not trying your own sonsorship?
If any assistance call me on 33536966 Varghese