Big houses

Today in Chok Yisroel Rabbi Chaim Vital, the main chusid of the Arizal, criticises large houses, he says the people in them are on their way to a very narrow grave, so why do they want to accustom themselves to living in such spacious quarters?!
Rabbainu said we should accustom ourselves in this world to the ways of the next.
This is one of the reasons why it is so important to say, sing, and dance Na Nach Nachmu Nachmun MayUman!