While we’re talking about Health & Safety issues, consider what’s involved with actually pulling the cable. In most cases, access is easy – lots of contractors will just use their truck to haul through the cable.
 

But when you’ve got an inaccessible room or vault, then what? Haul by hand and risk a back injury? Drag in the winch, set it up, etc? It could take two guys half an hour to set up, easily. Or put a guy off work with a back injury = worst case.
Why not just use the Tuf-Lugger cable puller? 6500lb maximum pull, easy to manoeuver, quick to set up, 120V power, reasonable price…
You won’t use it every day. But it will be well worth it on the days you do.