I have read that dry aging isn't near as difficult as it's assumed to be. Seriouseats.com did a big write-up on it and he just used a mini-fridge I believe for his dry aging. Humidity wasn't a big issue. I believe their research though as long as you are using large whole cuts of beef. Aging small cuts like single steaks wouldn't work though no doubt, at least not for long periods of time.
Here's the article - Dry Aging at Home
Weber Spirit E-310, Weber Performer, Weber Smokey Joe, Mini-WSM, ECB Electric.