Fans are ok if they are low noise and driven from an external fixed supply. My server is in the garage, where only the spiders hear the noise of fans .
I really like your sense of humor.
I don't care about the fan noise itself. I experimented with 140mm case fans and let them spin at 200 rpm. Absolutely noiseless. It's about the micro-housing resonance that such a fan always causes. Sensitive electronic components are given a massage. The PWM control ensures that the current is regularly switched on and off in the high-frequency range in order to maintain the rotation. Last but not least, a fan causes dust to be blown up. If you make it long enough you can make a winter blanket out of it.
Your server looks good, but needs a metal top and wire to bond it to the rest of the case
Thanks for this and the tip. I think about that.