I had a similar problem. In the middle of the room, I went UP to the ceiling, OVER about 8 feet and then DOWN the other side for a total run of about 25 feet. It has been working about ten years now without any problem. This was for a switch machine power supply and I used 14 gauge wire. The voltage at the source is about 2.6 volts. The drop is minimal. I don't remember the actual voltage drop. I did not disguise it. It still looks like wires hanging from the ceiling. I guess you could put a model kite on it.
Just a thought.
Ed