I am not the guy to advise you on this but I would buy a suit.I was going to tease you about looking like a real gentleman, but I guess I won't. I'll be 75 soon and I've never owned a real suit in my life I think I want to be buried in blue jeans and a T shirt, but my mom is 95 now and I've been thinking about whether I should buy a suit to wear when we have to bury her. My sister will probably be upset with me if I don't.
However, this advise if from a man that had to wear a suit ever day of my working carrier.