Right now, I'm currently building an ork Great Gargant for myself in the workshop I'm getting educated (as a blacksmith, in case you haven't figured it out already.

). It seems plausible for me, but with the bottom plate and the feet, it starts to be a bit heavy (although not enough to hold it in one hand).
I have planned on just having a bottom plate, feet, steel frame, big guns and sockets for the arms in metal (and perhaps its claw arm too), and use plasticcard for the rest (which is the head, smaller guns, blades on the claw, more armor plates etc). And of course, I do have an idea to have it so I can split it up into multiple parts for transportation.
But do you guys think it'll be too heavy once it's done?