AWS is expensive. You can find cheaper : find low cost gpu box (but your need to setup things) or use online hash cracker (they know the things).
For example onlinehashcrack can test your charset for around $70 in few hours. Or gpuhashme for few satoshis.
For example onlinehashcrack can test your charset for around $70 in few hours. Or gpuhashme for few satoshis.