i'd be better building it ground up to make sure everything is fine..kernel is easy to setup..the vendor and device files are the PITA..since this is a unsupported device and the next closest base is the Droid DNA..
It will be nice to have CM for our device..My wife has a Xperia Neo V and there is so much of development with respect to Kitkat and CM..I am not trying to compare here as i know the difficulty based on the device..It is just the curiosity and anxious to get CM thats it...