Have you looked at the voron machines? They come in either a self-sourced or kit form and you build it from the ground up.
The sibor or fystec V0.2 kits often can go on sale for less than 400 on Ali-express.
The best part about these builds is the community and the dedication to making fantastic printers to at you can build and learn with.
That’s a fun arty favor, I love being able to print silly little toys for the kids that they cannot find on the shelf. Sure, it’s a mother silly plastic thing, but I made it for them and that’s neat imo