Bumpers mirrors and side trim on a Titan, you are looking at a lot more than 2 hours AAE. R&I and prep time minimum 12-14 hours (you gotta mask a lot of that stuff) plus 2 hours minimum paint time and materials. 16 hours is what I'm thinking and that still may be a little low. At our shop rates here I figure around a $1000. (time and materials)
If he wants everything chrome, painted, $1000 seems pretty reasonable to me. R&I the Grille, Front and Rear Bumpers, Mirrors (gotta pull door panels to get to those) plus all other chrome trim. Prep it all, mask it all, then paint, that's quite a bit of work. Seems a whole lot better deal than $400 to do onyly the Grille and not have to R&I it.
I think Barry was saying he would want to get more. These kinds of jobs are hard to bid, imo. I do them on a case-by-case basis, parts need to be disassembled for paint, some things need retaping or new clips, etc. For a whole vehicle with bumpers handles, grille, mirrors, $1000 could be a bit light, especially since the bumpers will need overhauling in most cases. But that's just me, I'll decline to refinish chrome parts if they can't be disassembled for good prep access. Otherwise they can eventually peel near poorly accessible edges.
The guy Barry directed me to dips his pieces. He also has a dustless blaster. He's set up for it. Without the proper tools, the occasional job would be enough to remind you why you don't want to do it.