To hire or to buy?

I was just looking for a mens tuxedo online, my fiance needs to get one for an event he is going to in a few weeks time but isn’t sure if he should buy one or hire one – I say he should just hire one, he is 30 years old and has never needed one before so I can’t see him getting much use out of it, but I am going to find out how much they cost to hire vs how much they cost to buy and make the decision from there