OK, they offered a construction service, but its only 49 blocks that you clip together - so how hard can it be, right!
You guessed it. Wrong!
We unloaded it, laid it out on the grassy slope to the water thinking it would be easy to slip in after it is built. But, nope, it needs to be on a flat surface. So we moved it to a flat bit of the lawn but nope, there really isn't a flat bit of grass!
We finally moved it to the concrete dock so that we could build the middle three sections, then the outer rows separately. Manhandled launched the middle section and then connected the outer rows after launch.
Bottom line, the husband and wife that dock build together, stay together - so long as next time I pay someone else to build it!