1. 50/50 - never know what direction the organization is going. DA probably deserved a shot. Rizz brings energy and fire but doesn't have the long ties to the organization that is so coveted here.
2. If they decided to give him the opportunity, it shouldn't be more than 3 years (the standard is generally 4-5 years) with significant buyouts. 3 years 12 M with low buyouts. year 1 - 3 M, year 2 - 4 M, year 3 - 5M with team friendly buyouts every year. It's effectively a prove it deal from the first year.
3 - Yes. I think he jumps at the chance to be a HC.