I haven't seen a quick access safe for three pistols. My suggestion would be two safes. One small quick access safe like the ones made by gunvault kept nearby affixed to furniture to dissuade theft.
I would then get a second, more durable slightly larger closet safe (also mounted). I used a rotary combination fire safe made by sentry intended for documents found at Home Depot. Given limited space and budget, that's how I'd roll.