it's a TARDIS

Any fan of Ed, Edd and Eddy will know the fact that the Kanker’s trailer has one very, very extraordinary feature.  Having large multiple rooms and even an upstairs inside a structure that cannot hope to hold them.  To my knowledge there is only one device that can do that.

A TARDIS.

This might explain why the Kanker Sisters just turned up one day.  And where their male parent is.

Let us hope he left the child lock on the control panel in their home.