Without prejudice I hope because it was only the limited space in my workshop that prevented me from buying anything larger than a mini lathe but from remembering the experience of others:-
There are industrial machines available that, as has been said several times can be bargains if in good condition, but cans of worms if not.
What has not been mentioned is that industrial machine specific tooling, chucks, steadies, toolposts etc – all essential – do not seem to be available at such bargain prices if not included with the machine. A fellow club member was selling a lathe a few years ago and was advised to sell the lathe alone for what he was expecting to get with the tooling. The chucks and both steadies then went for 50% as much!