

KDE just works on my machine, which is lower specs than yours. I’ve never had it crash. I use Endeavor OS, so it came with it by default (which was part of the reason I chose it).
Edit: I don’t do much tweaking of the KDE settings other than the main color scheme. I also have never had an issue with waking from sleep on Endeavor (but I recall in years past that was an issue with most distros I tried and unrelated to KDE since I was less a fan of its style back then and didn’t use KDE). My set up is a normal desktop PC that I use daily for everything, including gaming.
I know there’s a pretty flexible self hosted finance manager called Firefly. Not sure if there’s any functionality built in related to donations specifically though.
Figured I’d at least mention it since I only see one other comment so far, just in case it’s helpful.