You're a building contractor, hire one of your subs to fix the interior. Chances are, your cabinent/trim workers are more skilled than the people showhauler uses. It's going to be cheaper than 4 days worth of gas and round trip airline tickets. And as a bonus, your subs are looking to please you, they want to work for you again in the future.
On the slide-out, check all the mechanicals. Make sure everything is in alignment and tight. Then check the seals. One of the near-by RV dealers should be able to recommend somebody. Not to be a smart ass, but you didn't notice the noise on the test drive?
The skin is a bigger problem. Not only is the tape expensive and apparently difficult to install correctly, but removing the panels so you can reinstall them is going to be a pain.
As you can see, I'm not a proponent of paying someone to fix something they did wrong in the first place. To me it sounds like the body is flexing excessively. It sounds like the staples are kind of like nail pops in sheetrock. The slide could be noisy because the opening has changed shape. If that's the case, then you may need to deal with the flexing problem or you'll be doing the repairs again.
-lee
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