I'd recommend getting an old laptop that is well supported by QubesOS, the HCL list has lots of those that are inexpensive.

The pure, brute power you get using QubesOS is hard to describe, writing this in VM that holds everything for the Lightworks account well separated from anything else I do.

It won't become the main driver for anyone the first months I think, which is why getting it on a separate device to start learning its ways is the most realistic :-)