Cheapest eGPU for Mac mini 2018?

Question

Video cards

Hello! I want to put an external graphics card in my Mac mini 2018 (thunderbolt 3).
The prices for the case are somehow not particularly encouraging. Can it be somehow cheaper? From the old computer there was a b / n at 700w, I can make the case myself. Don't care about the collective farm.
Thanks in advance!

Answer 1

It's all about connectors and software.
As far as I know, the cheapest is about $500...
Well, video cards are limited there, not all are suitable.
It is necessary to you such haemorrhoids?