Deductions & credits

From a general perspective, is it reasonable to setup an LLC in the future and use that for that business to make it separate from personal matters, and hire her to do that and make her a W2 employee *if* I can make a good guess about the income? In that case she can avoid paying the self employment tax, right?     RIGHT

But yeah that needs some additional paperwork: register LLC with the state and get an EIN and file something annually?   CORRECT