Oh, I agree with your arrangement after reading the conditions.
However, just in my own opinion, it is also not appropriate to use Ryzen to build servers. A Xeon E3 or E5 from the obsolete servers in data centers will be just enough. These CPUS are generally not outdated nevertheless. (Since data centers often update their HW in 3 or 4 years. They are also in good conditions since CPUS hardly damage. The price of them is also very nice because of the huge number of them.
For instance, I just searched in a online shopping website. There sellers sell E5 2680v2 (10C20T TDP 125W)for roughly $150 and sell E3 1275L v3 (TDP 45W 4C8T) for $100. (It's another form of recycle, it isn't?😜)Brandnew motherboards from reputable manufacturers are not much higher, too.
I'm considering about build another NAS with them, after passing the National College Entrance Exam in June this year.