Chinese 4 x 4 production grade machine - Brands names to look at it steer clear of?

[SweetAs]

Afternoon guys, apologies for not coming back to you. Things have been manic in the workshop!

Some of those machines look amazing! Originally I wanted a turn key option but I'm quite liking the look of the builds. I've built smaller versions of this sort of thing before, I heavily modded the Shapeoko design and built that from scratch, I know it obviously doesn't come close to what some guys are building but I imagine the basics are the same or am I kidding myself?

Can you recommend any builds or planes with a BOM so I can figure out what I would need?

In terms of machining plywood and MDF, would an ally Frame work or would I need to go to steel? Ideally I would like to be cutting 12-18mm MDF in a couple of passes.

Feel free to tell me if I'm dreaming by the way but if you could point me in the right direction that would be awesome!

Thanks for all the help guys!