Where Can I Buy Curtains like these?
A full drape is simple - I don't think you'd have any problem re-creating it. You'd be able to find a similar fabric for that . . . the only iffy thing would be the tassel and trim.
The top is a cornice box - which is simple in construction: 3 pieces of wood, some padding, a staple gun and screws, your fabric and wall-mount brackets. For a cornice box many people use an adhesive to attach the trim rather than trying to stitch it up. . . assemble the box, affix the padding, wrap and staple the fabric in place.
Now - you can still have the same look without making a cornice box by buying a wide slip-rod which is a fat verion of a classic curtain rod and attaches to teh wall in the same way - you'd just make a sleeve of curtain and slip it on. . .time saver. These are called a continental rod.
For the fabric - the top looks like microfiber which is a faux suede but the bottom is lightly crinkled so it's probably a common poly-blend . . . not expensive as far as drapery fabric goes (which is usually called home decor fabric in stores). This stuff is usually sold on a round bolt - 54" wide selvage to selvage so keep that in mind.
Go to a fabric store - big names carry traditional fabrics and trims usually . . . but the single-shops that aren't chains can carry unique or specialty items taht you won't see at places like Hobby Lobby or Joannes).
Look around - see what's out there. You might find something you like better.
Spending anywhere between $50.00 - $100.00 to drape a window is reasonable and actually can be considered on the low side: meaning many might spend more. . . keep an eye on fabric clearance and sales (shopping online for these is smart if you see a fabric in the store you know you like)
At this present moment in time I am making cabinets for the kitchen - just in case you wanted to know what I'm doing when I'm not around.