It seems to me that there are at least two sides to the "argument"...
(1) When you add the costs of tools, supplies (paint, glue, etc.) and labor, it is more practical to buy the ready-made kits.
(2) On the other hand, if one has that time, the tools and the supplies, it is cheaper to buy the kits and build them yourself. If properly taken care, the tools will last a long time and be useful for many projects. And I can't imagine too many projects where one would use an entire bottle of paint or glue.
And there is another angle that comes to mind -- the satisfaction of building something yourself. That would probably be the reason I've modeled in so many genres (railroading, aircaft, armor, ships, sci-fi, just to name a few) over the years -- when I do a good job of putting a kit together, I just feel really
satisfied that
I built this, even if "all I did" was assemble and paint a kit...
My two cents worth... (and we all know what two cents is worth these days!
)
Regards,
Tom Stockton