You have to make hay while the sun shines, but making hay all the time isn't good. What do they say "Anything to excess is not good". I can't say working this much is good or fun, but since I love what I do it is tolerable. I don't get cabin fever, I just get tired of being here. I did turn work away last year,but only because I just didn't have any more hours in the day to get them done. If I can't give someone great service, then there is no reason to take on the project. I take on the projects because they are typically great repeat clients and I don't want to disappoint them.
I can't tell you the last time I went home at 5 PM, ate diner and watched some TV. I can tell you it has been so ling that I no longer am familiar with current TV shows on the tube now a days. I can tell you all about Spotify and Youtube.
We all need money, but time is a precious thing. I am very fortunate that my wife puts up with me, but she also understands this is how I pay the bills to have the nice things we have (house).
Enjoy the time you have to relax and spend with friends and family. While I am not fond of working these crazy hours, I have been on the other side with no work and this isn't anywhere as bad. The stress of wondering where your money is coming from to pay your mortgage is far worse that working all nighters.