I have several 20 ft LCS cables installed and have no issues with power. My wifi and serial modules are first right after the power, followed by at least 2 ea 20 ft, a couple or 3 ea 10 ft and a couple or 3 ea 3ft. I have 7 sensors, the seventh is on an IRV2 with just one sensor installed.
No issues. I bought a couple PDI joiners awhile back and will let one go if you find that you need it.