I once was involved in implementing a radio control system for a gantry crane, the guy that designed it owned the company, he was an ex Air force engineer that designed the remote firing of ICBM's !Wireless remotes for cranes do exist: https://www.tele-radio.com/us/remote-control-cranes-lifting/
Again (and you even gave me a like the first time) he is not making an elevator or lift, but a winch.My point is that iit will not be simple to keep the system safe enough for a lift system that may carry people.
by Aaron Carman
by Aaron Carman
by Duane Benson