There’s a very simple tip, don’t spend money until you know you are going use something.
Some companies have an “approved” tool list along with “approved” test equipment. They will provide the kit.
My first day at a new company after 30 years in the trade I showed up in the workshop with one of my tool chests in a wheelbarrow.
“What’s that?”
“Half my tools.”
“Put them back in the car, there’s an approved kit in the office.”
Now I’m retired, I’m up to my eyeballs in tools and test equipment I’ll never use.
There’s a lad just out of his time on the UK forum I help run. I’m sure he’s waiting for me to pop my clogs so he can get his hands on the stuff. My son doesn’t want it so why not?
He’s started on his own and is picking up work in old buildings where imperial conduit was used. Next time he visits we’ll dig out all my conduit gear both imperial and metric. He’s also learnt not to throw old conduit fittings away, they are useful if you have to alter imperial gear.
We all gather “junk” that’s of no use to us now, it may as well help someone new to the trade.
We had a topic about MICC (Mineral Insulated Copper Clad) cable. I’ve never made one off in my life. One of the youngsters is calling round with some to teach an old dog a new trick.