A Special Prosecutor is not out of the question; Sessions already responded to the Goodlatte/Gowdy letter by stating he is considering their request.
The fact is that the OIG has been investigating since January 2017 and the DOJ prosecutor and Congressional committees since last summer. This means an eventual special prosecutor can hit the ground at a full sprint with most, if not all of the investigative material they will need handed to them on a silver platter. Moreover, The FBI’s Little Rock field office has been investigating Clinton Foundation for several months already.
Grand Juries can be empanelled immediatey (if they haven’t already been). Give Sessions and Trump some credit; they are not napping.
I hope the first thing the special prosecutor does is subpoena Mueller over his reasons why he decided to go after Trump when the overwhelming evidence points to DNC collusion.