Yes. When you enroll in a program of 6 months or more, you receive a student visa and this visa gives you the right to work 20 hours a week.
No sponsor is required. Schools support students directly in the visa process
It depends on the type of program:
There is no income tax in Dubai. All of your earnings belong to you.
Students usually stay in residence-type residences. There are facilities such as pool, gym and shuttle service.
The Dubai campuses of Australian universities are TEQSA accredited. The diploma is exactly the same as Australia.