When taking an inside photograph, how can I properly expose the inside of a room as well as the view outside of a window?

I’m a realtor, and for each of my listings I do virtual tours. I use a Canon EOS 30D. In professional virtual tours they always expose the view perfectly. But when I take the photos its difficult to expose outside and inside.. Views from the windows are always overexposed to just white light.. I’m aware of HDR photos but I noramlly don’t carry a tripid around to do virtual tours.. What else can I do to correct this..