Hey Mobius, you need New Yankee Norm on that.
Seriously, if you can put together a flatpack kitchen unit, you could build that.
As always, the drawing makes it look more complicated than it really is.
Magnify that plan, and look at each part. If you cut the pieces accurately, the assembly will be easy. Probably take a weekend all in.
Have you got any carpenter friends?
I'd do it, but that thing is gonna weigh a ton, and postage from UK would be expensive.
No offence, but I think it looks like a '40s fairground ride, and would be more tempted to go for something like Painless uses.