Different Power Cable Types/Designs are able to have an impact on the end sound when added.
Unscreened vs Screened - Dielectric Material Type used - Wire Stranded or Solid -
On the Cables being referenced the Cylinders with Wire Passing Through is a most likely a Ferrite Core. There are today very advanced paramagnetic materials which are much improved over Ferrite, on a Cable of the Value referred to it might be a advanced materials used as the Core.
The Core is in place to function as a low pass filter. Typical use is for power cables to reduce EMI (electromagnetic interference).
Cable Terminations also go a long way on the Function and will be for the better if Solid Copper. Solid Copper used on the Devices Power Inlet IEC will also help.
A Power Cable produced following guidance from the builds shown in the Link will get a lot for less monies that being suggested.
For half your suggested budget there is looking like all the systems devices could have there own bespoke Power Cable Design using Pure Copper Termination on Cables.
I am an advocate of PC Triple C Wire as a Signal Wire, Speaker Wire and Power Cable Wire.
https://forum.audiogon.com/discussions/duelund-conversion-to-diy-helix-geometry-cabling