I spend or spent 10% of the cost of a component. $2,000.00 = $200.00 for cables.
In looking into this I've found that some people even break down the components into a percentage, i.e. 60% for speakers, 30% for sources, ect. ect.
I bought the "best" turntable at the time I could afford, SOTA STAR Sapphire $2000.00 and pretty much stuck with that as a general rule of thumb. Cartridge, pre- amp, phono amp, headphones, Headphone amp, amps. speakers. DAC. After making my mind up for the final choices based on my preferences for sound. I'm happy with the final choices.