Meural Cloud Space with Multiple Frames

So we currently own 3 meurals on one account.  Is there a way so I can get 6gb's of space instead of the 2.  I think it is silly to have to create 3 different accounts so that each canvas can have its own 2GB of storage.  I also wouldn't mind paying a fee for more space but I don't want to pay the steep price because I wouldn't be using any of the art pieces.  We just like to display our family pictures.  But I really feel I should get 2gb for each canvas purchased.  It has kept us from purchasing more.