Normally all guns are kept locked up in a safe. If I'm at a collector show or needing to take a few pics I just use 5 gun stands that break down.
For home, I did finally decide that I wanted something to display guns that looked nice. Nothing would be stored in it - that's what safes are for. But nice to bring out the toys when appreciative folks are stopping by. But looking at larger gun display cases had me choking... I don't blame the guys for the prices that kind of work brings, but quite a bit higher than I was willing to go.
So, my wife found a 50 year old china hutch at a local thrift store and I'm about done turning it into a 14 gun display case. Oh yeah, spent a total of $100 on the china hutch. Nobody wants them any more, too big and too hard to move and nobody has china. Check your thrift stores and craigslist.