There are places you can spend less money than this guide suggests (Weller soldering gear is a ripoff, mediocre performance for premium prices; Amscope microscopes are surprisingly great) and places you should spend a lot more (Rigol is not great, at least go for Siglent... and you should plan to spend as much on probes as you do on oscilloscopes... and you probably then want all your oscilloscopes to be able to use those fancy probes....) but, yeah: money pit.