Is this possible to brute force?

[idop]

Hi guys,

I'm trying to brute a password, known to be between 12-25 characters, here is the list of possible chars:

Code:

ertyudfghjcvbnm34567

Can be uppercase or lowercase and in any order, but no other char or number (only the above).

I have the 5000-iteration sha256 hash of the password.

Is this something that can be brute forced? or I'm wasting my time?

I am going to rent GPUs to do it (RTX 3090).

It will be really helpful if some one can give a mere estimate on how much it will take with this GPU.