This very small version of the rig is much more affordable than the big one. It should be doable for under $10 on BrickLink, etc.
Working in the micro scale like this is an absolute blast. It forces you to choose the most important aspects to convey, similar to traditional origami.
This beast of a vehicle is the Rig from the podcasts A Knight of Shreds and Patches. It’s how they transport around their armored mech suit (the titular “Knight”) and get around. This set has all valid piece colors.
Note: These instructions have not been color/price-optimized.
Another of my favorite podcasts is A Knight of Shreds and Patches, a post-apocalyptic story of a band of mercenaries trying to make ends meet, with a big, beat-up armored robot.
Overall this model turned out well. It’s got the sort of half-disassembled feel of the Knight from the show, and does so for around $20 in parts. There’s enough articulation to modify the poses slightly, but the arms in particular are very delicate. Also, to get the right leg shape, the legs aren’t able to be extended any further, so you’re basically just getting the ability to move the legs a little wider or narrow and point the feet slightly in either direction, but it looks great.
It’s a great piece for display, but isn’t sturdy enough for play.