Hi bsteele,
Thanks for your post, it's nice to see someone thinking about taking ANT in new directions. There is no reason that ANT wouldn't work well in the situations you describe, and there is a lot of buzz around home automation and home health applications in the market now. There are a handful of wellness focussed ANT+ Device Profiles: Blood Pressure Monitoring, Weight Scale, Glucose Monitoring and Pressure Sensor Array (for preventing pressure ulcers). The ANT+ Controls Device Profile is used by action cameras and bike computers at the moment, but would work fine for music players and deck lights. You could take a look at that for some ideas of how to structure control information over ANT, and either use it directly or create your own system (make sure you don't use the ANT+ network if you are designing your own system though).
There is a new development kit that will be available soon, which would be my recommended option for transmitter and receiver modules. Watch for the announcement when that is released.
Kind regards,
Kat