When I first started out in BP revolvers, in about 1975 or 6....
I worked exclusively with kits as a way of saving money.
Every revolver, rifle or single shot pistol I owned started life as a kit with the exception of a Colt Ballister in .44.
I came to realize that there is an alternate and more appropriate rationale for building kits and that was that doing a pistol from a kit permitted the shooter to come up with a piece that was better looking than what was available in ready to shoot versions.
Two things have changed since then.
1. The care taken by manufacturers has increased, producing a better looking pistol at roughly equivalent cost.
2. Uberti wasn't doing kits then.
So at that time, I was able with my level of skill to put together a firearm that compared favorably to those non-kits that were available. Now I can't.
I think that if your goal is to wind up with a Walker that is more appealing than you could buy already finished, the kit is the best place to start. If you just want to save money in exchange for your time, you would be working awfully cheap.