Pines are similar to great white sharks. A great white shark is like the King of the ocean. They are tough creatures that are built to be survivors. However, they cannot survive in an aquarium. They need the flowing currents and other habitat qualities the ocean offers. Pines are seemingly also at the top of the plant kingdom. They can survive incredible obstacles. They live for centuries even against nature's many obstacles. These trees are so tough that some survived the atomic blast in Japan during the world war because they were shielded by a wall. They can survive an atomic blast, but bring them indoors or deprive them of dormancy for a few years and they die
It has been mentioned in this thread about success with cold storage areas and rooms. I think what needs to be mentioned is that these areas are in climates that have, to some degree, cold winters anyway. It is true that quite a few people put there trees in a place and then close the door and pretty much forget about them. With the exception of maybe watering a time or 2. However, once again, these tend to be in climates that have some degree of cold in winter anyway.
I am not saying that someone in a hot climate can a pine alive for more than 4 years. However, as far as I know, I have never seen it. If we approach it from the point of view of what a plant needs, you could use the refrigerator idea. If you want to go all out. You could do the following. A small walk in refrigerator. You could set the temperature for 39 degrees F. Maybe have a small fan set on low in there or just rely on the fan in the fridge. Maybe have the fan (not blowing on the tree) on a timer that circulates the air a few times a day, Next, set up a humidifier. Also, have a window with just a little outside light (no sun). Although light might not be necessary, I usually have a little light coming in through the windows in my storage area. No sun, just a little natural light.
Rob