I recommend the Shigetsu Ryokan in Asakusa for accommodation. Ive stayed there twice now, cheap close to transport and has the Asakusa markets and temple at your front door.
And yes the drive back from Nismo was epic. I took one for the team and drove through the sleep while i heard 4 different pitched snores from behind me lol
Wont be attending this year unfortunately, i could only get 2 days spare so it made my decision.