Thanks a lot for your advice. One day, when I'm ready, my bird room would be one that resembles an indoor miniature landscaped backyard,filled with trees, shrubs, natural stones, a bird bath in the form of a water feature, a stone pavement and an arbor. For now, it's only a dream, but I encourage other people to try that too. It'll be a haven for both birds and human.
Regards,
Chris