Scaffolders – you need to be a certain kind of mental to do that day in day out.
“Abseiling”, more properly Rope Access – look at IRATA as other have said.
As above, you need to have a trade to go with it
You have to remember that working at height is just that – electrician/plumber/roofer/painter/welder/etc – there is a job to be done.
The only special bit is that no-one else can get there….
This is very true, unless you just want to spend your life cleaning windows or painting stuff, dope-on-a-rope stylee. NDT and inspection is where the proper money is.
As an alternative – what about entertainment industry rigging? Reasonably easy to get into if you are unskilled, but have a positive attitude and are a hard worker (its all freelance based), and there’s plenty of opportunity for dicking round at height. Definitely a “lifestyle” job though – it’s anything but 9-5. The decent companies (Outback, Unusual, Roadrunner, Nippy) all do on the job training, and there is a new formal quali in the form of the National Rigging Certificate.