3 comments here:

proxypass isn't just more expensive - they charge $49 per month so it's ongoing.

epoch doesn't generate passwords - or at least they didn't used to. we had guys earlier this year create logins in epoch like

bigmac
mc1234

and

unicorn
horn1

until your domain is attempted, neither proxypass, pennywize nor strongbox will "know" anything about anything. what's more, proxypass requires an install and a change in your apache, so whatever happens DOES at least partly happen in your server.