So I need to run a vacuum line from the new exhaust I have to the front.

I’ve looked underneath and it looks a pita... so I’m thinking of going up from the exhaust through the cubby under the rear fuse box and then following the loom from the rear to front under the cill trims then through the fire wall with the bonnet cable.. I then need to T into a vacuum line.

1) any issues anyone sees here?
2) Which place would be best to get a vacuum line Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF