I presume you are a member of the group that is willing to store instruments outside of their cases? If so I will express an opinion that I'd consider trying that rack. I'd also look and see what some others have used. I seem to recall someone, West R Lee? had some Hercules wall mounts that they liked and have about a decade of experience with.
I will also ask where will you store the cases? If your music room is small but must accommodate the cases as well, you may want to consider a rack that holds cases and a floor stand for the instruments you want for grab and go.
