I read that bamboo is a problem in back and side yards (but good in the front yard) - that it leads to money problems and effort gone to waste. We live in housing provided to us so cannot make changes to the yard. If bamboo is a problem in those areas, how about burying metal coins to control? We also have a (very little used) street pointing at our front window (which faces west). I've hung an eight-pointed gold star (actually a Christmas tree ornament) in our entry right by the window. Is there anything I can do to deflect the sha qi at the angle it points at the window? Thank you for your help!