>>13 more like D&D I would think.
>>11,>>12
Even with the limits imposed by the spell "Mordenkainen's Magnificent Mansion" an epic version of the spell would at best give you about 120,000 square feet if my calculations are correct. However, given that you are effectively in your own extra-dimensional space it does pose the problem of how to communicate with the outside world via the internet, I suppose the simplest way would be run a cable to the door and leave the door open or simply make the door an antenna.
b4 you ask, no I'm not a wizard, I'm a Mage, and also before you ask what the difference is, the difference is no pointy hat and a school of magic or two barred, in a nutshell,...hmmm Magnificent Mansion in a nutshell, that gives me an idea, though squirrels might be a bit of a problem....