So you think you are a pretty major homebuilder, maybe even put together a plane or two from scratch, with wood or tube frame or glass, not even a kit.
But in the big scheme of things that is a drop in the bucket or in this case a splash in the ocean.

A man in Holland has built an arc. That's right an arc, but not just a model, he built a full size replica of the real arc, assuming there was one.
He researched scripture and got the size in cubits.
His is 447 feet by about 105 by 75, and it took him 20 years to finish it. No word on how many, if any helpers he had.
Shades of the Spruce Goose, except maybe no props.