It is not bad for hobby but it costs money, time and space. IMO, you need to use it significantly to justify this. I have many hobbies, do I have enough time to devote to the plasma CNC.
For example, I’m currently cleaning a forest from fallen trees and use the wood for firewood or to make lumber. I can only devote a few weeks a year to do that and it requires equipment that is expensive but I justified it based on the fact that I want to preserve the land, I need firewood, I can’t get someone to do selective cutting as it is too much work for little return.