Klopp and Wagner will be a fine example for the next German managers.
And Sunderland offers several things - big and loyal fanbase, great stadium, potential and decent interesting backbone of players - Pickford, Kirchhoff, Ndong, Gooch, Watmore, Khazri.
Cattermole, Larsson, O'Shea and Rodwell should be fine to lead the team back to the top flight. Add to that group 3-4 good signings and the Championship will be only a bad taste in the mouth after an year.
You just have to aim high, not the next hyped incompetent british manager such as Southgate, Hodgson, Hughes or Bruce
Yes that's all well and good, but Sunderland are owned by Ellis Short.