Hi guys! Quick question, there's a way to enable ACH payments through Solidus? Maybe some extension? Thanks in advance!

Most people doing bank transfers just use the check payment method and verify payment manually. I doubt there’s an extension.

FWIW it's not hard to work with the payment calculators. They are fairly straightforward and I enjoy working with them. ACH should be more than doable with whatever provider you're using. Check always works too. We've even written checks out and mailed them before we got a proper Stripe Connect solution going.