26 May 2012 Instant Room. Under $3500! admin Instant Room Cheap Instant Room Instant Room Chicago Interior Designer Chicago Interior Decorator Interior Stylist Tiffany Brooks 0 Todays instant room is inspired by Mary McDonalds guest house. I have swooned over this space since I first saw it in Domino Mag. Its girly, functional, and perfect for entertaining. I estimate this room to be at least 30K. Mine, under $3500!