Don't have a photo/signature ID? THEN VOTE BY MAIL

See the attached Florida voter registration form. It DOES NOT REQUIRE anything other than social security number....

You get your ballot by mail, so I guess you can't be homeless...

Only those folk who choose to show up at the voting station would need to show ID to prove who they are.

Perhaps that helps circumvent the "poll tax" argument and the barrier to voter registration? Voter registration form