A room.
If I ever get a house..I’m just going to create one room, completely sound proof. Fill it with surround sound speakers, a cd/cassette player, and a record player. In the middle of the room..the most comfortable thing to lay on. The walls will be painted black and sprinkled with luminated with glow in the dark paint. The lights will be set on 3-4 orbs and on a dimmer.
I will lay there with a glass of wine and just get lost in a mix of music that fits the mood. Whether it be something heavy, moderate, or calm..that room should fit the perfect environment for listening to music in it’s most reliable state.