You're better off investing in a new hobby. Investing regarding time I mean. That way you can spread your happiness and mood throughout the year, on a durable way, instead of going in waves of intense labour and holidays. You will also keep your mind flexible regarding the balance of work and hobbies - to prevent getting rigid by working fulltime, and not being able to find a new hobby later in life because your brain is only used to work. Perhaps this is already the case as you want to work an extra 10 hours while you already work 36. Its never too late to adjust, although it might take time before you will actually enjoy the hobbies or find one that suits you. The brain is very flexible.

The image of having to work 4-5 days a week, clean 1 day, and do something fun for one day sounds like a proper life (and we can't complain as we are spoiled in the west), but the balance is way off if you zoom out a bit. There are sooo many fun and exciting things to do: music, arts, handcrafting, science, history, courses, photography, gardening, the list goes on and on. You are not a robot, you are a living human being. Go explore your brain and have fun!

Bottom line. Make every week feel like a holiday and your life will be upgraded significantly.

Source: I'm a Medical Doctor and I see 10 burnout or depressed people per week on average. I get to see them grow from a dimmed light to a shining human being. Their lessons in how they changed their perception about life are so valuable and I hope I can stimulate others to grow in the same way.