There will most likely be airco yeah, although I personally choose to not use it for environmental reasons. Here in Kuala Lumpur it's usually 30+ Celsius and 90%+ humidity, you get used to it :)
If he/she can make themselves useful, you're welcome to sign up both of you. But rest assured that competition for this will be tough, so it might not be easy. Just that it's not excluded from being an option, that's all :)
We'll see. I did a three month thing like this, and was sad when it ended. That was all about the people we were with though, that made the world of difference. And we had time during the weekends to get away.