A long time ago...... Before Windows 3.1..... I was given the unenviable task of fixing a sensor high, very high, up on a water tower. Awkward access but I was young then. Having reached the correct location I found that the fixing holes were not there. Apparently this was known but somehow that snippet of information had failed to reach me. As I said, I was young then. Did I have a drill? Yes but not 70 metres of extension cable.
A visit to the new 'DIY' shop found a Black & Decker Cordless drill on offer, £20. Back to site. Climb the tower. Drill the fixings. Fix the sensor. Tested OK. Long drive home.
That drill was so useful, I didn't claim the expense..... until our workshop asked to borrow it, endlessly..... It lasted years and had several 'new' (homemade) batteries.