Buying $40,000 in BTC

I want to buy $40,000 in BTC. Which provider will have the lowest fee for such transaction?

I have Coinbase and Strike.

I have Strike configured to buy 25$ everyday, but Strike won't allow me to buy this much at once (the limit it allows me is 700$).
Coinbase's fees are completely unclear to me.

After buying the goal is to transfer this to a self-custody wallet.