About the 80-char-standard: Should I just break the lines?

Break the lines where it's logical. For example when you assign the new Net::FTP object to $self->{ftp} you could restructure it like so

$self->{ftp} = Net::FTP->new(
    $self->{'host'},
    Port    => $self->{'port'},
    Timeout => $self->{'timeout'},
    Debug   => $self->{'debug'}
);
unless($self->{ftp}) { ... }
[download]

Play around with it and see what looks best to you. You might even notice some improvements that could be made to your code along the way.
HTH

_________
broquaint