Y’know, the passage adds that I go to prepare a place for you. And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also.
I think it’s about relationship. Our God is a relationship. Our God is Father, Son, and Holy Ghost. Our God is a relationship – and He created us to be in relationship with Himself and with each other. That is why our relationships cannot be separated from our choices.
(It’s probably also why the music video for When I get where I’m going is almost all about loved ones rather than about the streets of gold lined with mansions and such like.)
So whether your idea of a dwelling-place is Fallingwater, a log cabin, Stately Wayne Manor/Downton Abbey*, your grandparents’ house, or a tent among the Israelites of old, it’s a mansion if Jesus built it just for you, and Jesus is there with you, always.
*You know that Wayne Manor needed as many servants as Downton Abbey, but they didn’t have them. (Is there one character on D.A. who has kept a secret?) Poor old Alfred the butler and Aunt Harriet had to drudge for their living cleaning the whole thing themselves, when you think about it! One self-cleaning Jetson-house manor for them, certainly.)