Bedroom Windows -treatment advice?

That depends on the look you are trying to achieve

I have found some great deals on window treatments on Wayfair and Overstock. Since the windows are hung as a set, I would just hang the drapery panels at the side and treat the windows as one, but purchase panels wide enough to close over the entire set.

Do one and it should be down to the floor . It makes the space look bigger.

All Three as One if seen from the road........

I would run a double rod all the way across and use sheers underneath with curtains or drapes on top. The amount of panels depends on how full and fluffy ou want them on be or less panels for a more tailored look.

You might want to look at Goodwill. Seriously, lots of people remodel and get rid of drapes that are perfectly good. Same with consignment stores.

Otherwise, look at Target or Walmart for inexpensive drapes.

Since this is your bedroom is it mainly for light control?

Go floor to ceiling. Go wider than the ends of the windows at least 6 inches.

I would do sheers all the way across for a bedroom..... and they have some great colors now days... I would order one set for each window to make them full and have access to each blind, but hang on one long rod..... http://www.brylanehome.com/Home-Sheer-Curtains.aspx?DeptId=25389