I have no idea why you would even need several rooms for (unless if you have a family house) it would be very creepy for you to be hanging up images of Mia in your kids' rooms and etc. You, having a kid/wife though? very unlikely. So, again, why would you need several rooms for? Even if you live with your mom/dad, it is still weird.
You are a killer and have several rooms for your victims, with whom you will torture with Mia stuff all around. Trying to find the right victim (the IRL Mia) Dead bodies in the closet like you're the American Psycho.
You could use all that energy on something that is real (maybe a real person?) and not someone/something that is made up. I mean, I don't care for any actresses/etc but maybe you do. Why love/care about something/someone that will never feel the same way back?
But hey, if you feel good, then I guess nothing I say will change anything. Have fun feeling good.