/diy/ - Do It Yourself

>>2766634
I mean if you think you can just build one by buying parts its going to hurt, quite a lot.
Buy one thats as close to an out of the box product as you can within your pricerange. Second hand may not be a bad option.
Even the cheapest one you can find on aliexpress will be an excellent learning tool and get you the basis for printing any components you need to fix/modify the shitty one you have, or the 'it's full of stars!" one you decide to make and probably never finish.

I bought an anycubic i3 mega, becasue its frame looked more rigid than all of the extrusion based types available at the time. This turned out to be true, but ALSO its not somehting I can easily modify, so this limitation is a good thing that prevents me from the temptation to design infinite modifications that never get done.
Instead I am limited to minor additions/modifications to the existing components, and aside from adding stuff like cable chains, leds, maybe curtting holes in it to make cable ports etc.... the frame, and therefore the bed size etc is not something i can modify. Again, this is a good thing. It ensures I keep this printer operational. I do have a second coreXY that was a flyingbear p902, in parts and somewhat assembled heaps, when i am satisfied that my recently resurrected i3 is operational again I'll switch to the coreXY project again.
For many of us this is the curse and the glory of 3dprinters.

TL;DR: you need a functioning printer. Any significant experimentation should be done on a second machine. Use the first one you buy to learn what you really want from the thing. Then do that to another printer.

Or be a consoomer and buy an expensive 'just hit print' printer.