E Lucevan Le Stelle
in love with Judas
The only trem option I can think of is the Kahler ff 8-string bridge, which iirc is only available via custom order, which would make the price skyrocket. Individual saddles would be the only way to go.
As far as scale length goes, I would personally rather have it at 25"-28.625" so that everyone who wants it can have it, whether they want a high A string or low F#. And if that scale length is a little extreme for a low B, then at least do 25"-27", thus making the fan less extreme and having a decent tension for lower tunings.
That's the reason I was thinking that scale length - so that (with the Goodman strings probably) it would handle both a high and low tuning in the same guitar. A mass production fanned fret guitar would be a first - noone else does it - and I'm sure would do well, as the reason I didn't get on with my Intrepid (and sold it) was scale length issues - it just wasn't a great guitar for much except the usual "djent" kind of thing which isn't much of what I play. Fun, yes - but I don't really need a guitar for it when I already have the Death Warrior.