You don't have to buy expensive. You can do this with more affordable clothing. I know alot of places where you can get affordable suits from. They just won't be fitted.
To have A peaceful life always go for what you can afford!. It doesn't mean you gonna buy all those at once! You can decide each year You will be buying one at a time. Or you can buy and fit.... this as long as it can be good on you. You don't always have to go for first class things that are expensive