Cack handed must be a regional (southern?) term, that I've never heard before. I assume you mean clumsy.

Kits can be built by pretty much anyone with a bit of building and/or mechanical apptitude. You don't have to be a brain surgeon or a rocket scientist.

But as has been said, kits take considerably more work than an ARF (Almost Ready to Fly) or RTF (Ready to Fly).

An RTF might take 2 to 4 hours from box to flight ready (plus battery charging), an ARF 20 to 40 hours depending on skill, a kit could easily take 200 or more hours, again depending on skill and the kit you choose.

Not sure what info you're really looking for though.
Dennis-