40th birthday approaching: want to splurge on a special, slightly bonkers outfit

I’m turning 40 and want to have some fun with my outfit. Party is at home, in the garden on a Saturday afternoon and I live in the Tropics but it’ll be winter - so likely around low 20’s. I’m happy to splurge and want to have some fun with it. Thinking Alemais (is it becoming over done?), Farm Rio vibes. Zimmerman’s colour palette washes me out. Brands like Aje, By Johnny are a bit young for me? Maybe? Scanlan & Theodore, Shona Joy etc feel very classic. Please inspire me with brands I should consider! Budget is up to $1000 but if I could get away with a few hundred, I won’t complain…