YES.
To prove the point, compare & contrast a Tahoe / Yukon vs an Escalade.
How much would it cost a talented body shop to swap out all the Tahoe / Yukon stuff for Escalade stuff?
Point is, yes, it'd cost much more time and effort - but FAR less money - to do the above, than to just buy an Escalade ...
and if GM recently made it more difficult for a Tahoe / Yukon to 'get upgraded' to an Escalade,
it's expressly because GM needs to protect the ripoff.
Kind of doubt this would be less money.
For the exterior, You would need a new hood, new bumper covers, new headlights, new grill, some way to wire in the fog lights (since the bow tie doesn’t have them) new logos, new wheels, new running boards, new side door logos, new mirrors, and paint for all that.
From my experience when I had a small accident, one Denali Headlamp assembly is $1800, the grill is $1600, the logo in the grill is $425, and the bumper cover is $400 before paint.
And we haven’t even talked the interior through yet…which is a whole lot of difference.
I think the exterior could be done, but I doubt it’s “far less” than just buying the Low end Escalade