Whilst it's true that my needs are rather more modest, and music is not the sole use I put my PC to, I don't really understand all this 'administering' stuff. I just use my PC (a lowly HP8200, Windows 10 Pro 64-bit, 12Gb, SSD boot drive, several Tb of USB drives plugged in...). Every few weeks or so, as I'm shutting down, I'll be asked to wait while the System updates, usually a few minutes. That's it. I do nothing else to it. I turn it on of a morning, do what I want to do, including composition, using Reaper. I'm typing this on the same machine; I have no issues, no viruses nor malware, I record my instruments (guitar, bass, keys, mics...) through my Tascam interface with no problems... While it's not the most powerful of processors (i5, 3Ghz or so...), it certainly isn't a sluggard, and copes with as many tracks and Vst's as I need to use, depending on the compo. No, really; no complaints here.
The UC cost around £200, refurbished, a few years ago now. Our Youngest has just bought a new i7 tower, fully 'speced', for just under 500€, delivered, which works fine, too.
Disclaimer: I spent the last couple of decades of my long career in electronics as Project Manager for several companies in France, specifying and setting up IT systems for their needs, including office and ERP software. I have some inklings of how to set up a System from a security point of view, and what traps and pitfalls to avoid. I may therefore be slightly more 'savvy' than some, but still, I wonder what this 'administration' involves that is so onerous and feared. Maybe I've just always been lucky..?