Open Air frame cases all the way here... My solution was to get my wife interested in mining. She's practical enough to recognize the money potential and she knew she was marrying a geek many years ago. 
We now even have a rig mining next to our bed.... 
I do have a full tower case for my main PC that has a pair of GTX 1080 Ti's in it (one of which mines around the clock). I would not want to put more then that in it unless you have a very large EATX tower. I tried that route back in the early days of Bitcoin mining on GPUs and it was a constant battle with heat.
We now even have a rig mining next to our bed.... I do have a full tower case for my main PC that has a pair of GTX 1080 Ti's in it (one of which mines around the clock). I would not want to put more then that in it unless you have a very large EATX tower. I tried that route back in the early days of Bitcoin mining on GPUs and it was a constant battle with heat.