Re: Case storage?
YMMV. As little a hassle as it is to take a guitar out of the case, I've found that I will end up playing less when the guitars are stowed. If the guitar is there on a stand I'm much more likely to grab it during the day and spending a few minutes with it.
I keep all my guitars out all the time. A guitar that gets the occasional scratch or ding is infinitely better than one that goes unplayed.
He's talking about a music room. Would he not be walking in to the room deliberately, solely to play music – not just happening to walk by and seeing a guitar, which might make him want to play it?
I have kept guitars next to the bed, simply for quick access for songwriting purposes. I keep a bass there now, in a gig bag. But that's more so I didn't forget things, not to encourage me to play.
I've never been discouraged from playing simply because a guitar was in a case. Nor have I been encouraged to play simply because one is sitting out. The frequency of play is really an issue of personal discipline, not how the guitars are kept.
I don't argue against leaving them out, period. Some people might like that. I do sometimes. I have a $2,200 Strat (though I didn't pay anywhere near that much) that's been on a Hamilton floor stand in my studio for over a month now, untouched because I have solely been playing bass lately...but I keep meaning to grab that Strat for a few minutes. I just don't think wall hangers are the greatest option. Hamilton floor stands are fool proof. Or those stands that fold out of Fender style hard cases and let you lean the guitars into them.
My number 1 guitar, a Custom Shop Esquire N.O.S. that I've had for over 16 years, has received terrible looking finish damage from being left next to my bed and having things dropped on it. I regret this damage now, Even though the guitar has literally scores of blemishes from being played out, I don't mind them. But I mind the ones that occurred from me being a lazy dumbass and keeping the thing out. At the time, I just wanted my favorite guitar nearby at all times. Now, I would at least keep it in a bag for the by the bed role, not on a stand.