I would use directional couplers all the way through if i actually took the job. I would strongly suggest rewire but if not theh set up a cascading system with dc's feeding spliotters where possible and ampify when your signal gets down around 3db or so, one problem you will most likely encounter is a bad slope towards the end of your run. Just think of it like you would hardline at the street. Rots-a ruck
This is CABL.com posting #195616. Tiny Link: cabl.co/mY3g