if you get a custom fork, it could solve all 3 of your issues. I just saw someone assert that low trail results in less wheel flop, so if true, that's the third point. It's trivial to have internal wiring, but you have to figure out where the wires are going. Putting it on the rack means that the wires wouldn't go through the fork very far. Finally, getting more clearance really depends on how much trail you have now. Not sure that you want so much rake, but a builder should be able to tell you .

Do you know what your rake is now?