TY
So yeah... Let him debut mid-late April 2019 and play 3B for an extended period of time.
Donaldson is gone, and the team is going to suck next year anyway
Let him play 3B all year no matter what, maybe occasional days off to DH. If he plays third acceptably, great. If he doesn't by that point, move him to 1B next off season between 2019/2020.