Brute Forcing LUKS Full Disk Encryption - Time?

let's say we have encrypted our drive with AES 256 XTS and the following Hash:

SHA1 with ~500k Iterations and a 20+ password

SHA512 with ~250k Iterations and the same 20+ password.

Let's think of the best hardware and the fastest hardware out there. How long would it take to Brute Force the Hash or the password in both cases?