3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: !functionalprint@kbin.social or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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No porn (NSFW prints are acceptable but must be marked NSFW)
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No Ads / Spamming / Guerrilla Marketing
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Do not create links to reddit
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If you see an issue please flag it
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No guns
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No injury gore posts
If you need an easy way to host pictures, https://catbox.moe may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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If you plan on doing a lot with the machine then yeah it does make sense to get something better than a Pi. But for just octoprint any Pi is plenty.
SD cards are a couple dollars, the pi 3 and below will run on any usb power brick. The 4 and 5 will run on any not low power brick you have lying around, but even if you feel the need to buy one the official one is like $15, and you can reuse it for other things too. And you can always 3d print a case if that's really a problem, but I just let my pis dangle there, or I put them back in their box.
Also second hand pis exist too, if you're really strapped for cash you can get a full pi, case, sd card, and power supply for about the price of just the pi new. During the pandemic when Pis weren't in stock I got a full setup for a pi 3 + this bluetooth keyboard trackpad thingy for $30.
But for 15$ more, you get an immensely more useful tool for when you (probably) inevitably want to do more/other things. SD cards for a few bucks burn out really quickly, so you'd really want a good one (significantly more expensive) or an SSD, bringing the total cost of a pi above a used NUC, with worse specs all around.
I really can't see the argument, neither financial, performance/watt or performance/$ for an SBC if you don't need GPIOs.
That's the key here, not everyone wants to do that. OP specifically asked for something to run octoprint, not an entire homelab. Not everyone is interested in that.