Wrong question. Correct question would be: "How much are you willing and able to pay for it?" (for me it much more strongly fails because of the second criterion).
Thanks, but I believe my approach to personal finance is quite right and responsible. This does not contradict the fact that there are things that I am willing to pay for, but not able to. Exactly because my approach to personal finance is responsible, I don't spend money in this situation.
There's the Talos Secure Workstation, which has no such ME firmware (but costs ~$4.5k) [1].
A RISC-V desktop is pretty far out. There is an Arduino style microcontroller being made in silicon, though [2].
[1] https://www.crowdsupply.com/raptor-computing-systems/talos-s... [2] https://www.crowdsupply.com/onchip/open-v