Looking to UP my game in local AI inferencing.

I’ve come across these Aliexpress listings that are way cheap. Considering that these GPUs require external fans they’re unsuitable for consumer desktops. I’m at a loss of ideas on which chassis is the best for me?

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I’m new to the homelab game; and don’t know a thing about blade servers(is that what they’re called?)… I’ve only done homelab’in with refurbished SFF PCs previously.

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PS: I know you can hack in a 3dprinted shroud/fan for use in a consumer case. But I’m looking to see if I can get a used server solution for cheaper or same price as building it on a new PC!