I usually spend much energy doing mining and other quest before teleporting to my avatar's house, which of course consumes much of my energy. I am aware that you can replenish energy by drinking/eating stuff, but i do wish that there was something else to increase my energy for the day (for free). I would suggest a bed for a "power nap" of sorts. Besides, that would be more reason to buy real estate, aside from just using the house as an inventory storage.