yeah, its a big range, depending on if most of that stuff is already in place - in which case it has (mostly) already been paid for.

As for the target audience, i think it is people who want a building within a few days.

As I mentioned, I looked at a number of similar systems myself (we have a number of providers of modular or flat-pack buildings in Europe).

I decided against modular, and had a custom built 6x12m 1.5-story log-build. The pricing was similar - but it took months to complete.