You're better using separate pairs for each driver rather than daisy chaining them but I can't see a problem with having those separate pairs bundled up in one sheath. Be aware that thermal considerations may mean using larger conductors in a multicore than 'free' wires with some air round them, and you'll pay more for it as well. Remember that electricity has no sense of aesthetics and a bundle of wires tied together with old old string will perform just as well.

Kit