We would not recommend a structure that carries that much weight. Hot tubs generally require a concrete slab for stability.
They would probably hold up. Much depends on the base
It may not be available in that color; just in sandstone and gray.
About 1 1/2 "
Good Morning Eve ... These pavers are 1" thick.
Good Morning Jack ... The Patio Paver you are asking about does get slippery when wet, unfortunately.
Our pavers are specially textured to create a rough surface that provides traction in wet environments. That said, be sure to always use caution when walking on surfaces that are covered in water, ice or mixed materials. And also be sure to properly support the underside of the pavers with fill material such as sand or packed dirt for maximum surface stability.
Yes you can cover your backyard if that's your preference, they do tend to get slippery when wet.
Yes about 2 inches