This works if it is broken into two trades. Hornets get picks from warriors in exchange for Zeller and McDaniels. Warriors use this as a bridge trade to match salaries so they can get Horford.
Horford is a perfect fit as a playmaking defensive minded big who can shoot the 3. Chriss would complement him as a backup big rim runner. Mcdanials is a young potential rotation/building piece on 3 yr deals.
Hornets drop salary and go after Montrel Harrell in FA.
Sixers get backup bigs in Zeller and Looney and a couple other young projects. They nab a couple picks including a 1st and get out from beneath the bad contract of Horford.