carbonel

This is the time, for all the reasons you list.

I don't know what's under the panels; probably some sort of wall surface already. They may be bonded to it, though, meaning destroying and replacing might be a lot easier. He probably knows, he should have seen this sort of thing a lot.

Make sure you understand whether the quote includes painting the new walls. And pick a less pink color. (Okay, they're your walls.)