The same way I remember everything else: I think about it enough. There are plenty of good memorable password mnemonics out there, too. So that seems a non-issue.

In any case, I'm sure those involved would prefer the option of remembering a password to not having that option and getting locked out forever. Seems like a good solution. There may be better ones you can implement once this one is, always room for improvement you know

I always recommend a easy to remember sentence as a password.

with spaces, punctuation, some sort of capilatiozation scheme (cap every last letter, or every other ,etc) and throw a number in there.

lot easier to remember than 32 random bits.

purposely misspelling something, adding spaces, and your own cap scheme make it a secure password.

Complex doesn't mean hard to remember. XKCD936-style passwords (four words with no special chars) are nearly uncrackable and quite easy to remember. Something even simpler like [mother's name][father's name][year of birth] is also very strong when you aren't being targeted specifically (you almost certainly aren't, especially if you're homeless). The remaining issue is password reuse, but that's mostly solved by having two passwords - one for your email and one for everything else.