airbnb business on my schedule C, if I pay my Child w2, do I have to register a company and a EIN#?

I rent out a room in my primary resident as an Airbnb and  will report the airbnb income under my schedule C. I have paid my 15 yr old girl for cleaning 3500/yr. do i have to register a company and get a EIN # and pay my kid a w-2? ( I want to contribute my kid's income to Roth IRA).