Opening a cafeteria in Dubai.

I’m working at a company I don’t enjoy and was wondering how it is and what does it take to open up a cafeteria which ideally would be located in a place where it’s dominated mainly by labors like Al Quoz and sonapur. Can anyone tell me what I need to know before getting into it and what I should be aware of or anything to help me. I am planning to give myself 3 months and by March I would like to ideally take over someone’s existing business.