Boyan,

there is only one extruder worth using. It is also worth going direct drive on such a large build.

The Bondtech extruders are E3D compatible so at least that is a good start.

https://emvioeng.com/shop/3d-printin...ndtech-qr-3-0/

You will need to heat the bed to allow adhesion and reduce warping. Think about how you are going to acheive this on a 6mm surface.

The rest seems legit

looking forward to seeing what you get up to.