I have an RTX 5070TI laptop. 95% I use it with Tumbleweed.
Unfortunately with work I don't have too much to play with LLM training and such.
The ultra poor person system is a used 200$ Thinkpad ( something about 2 years old) + your Linux distro of choice.
This is what the average computer user is using to try to run your apps and websites. And remember - a cheap laptop bought today is going to be in use for at least five years.
Around 300$ it gets better, specifically if you're open to Dell and other brands.
To me, all of those seem woefully underpowered, but $180 is $180...
I don't think traditional desktop operating systems are best for most people. I believe a Chromebook, or an iPad with a keyboard, is best.