I share your concern around the 100,000 homes in three to four years. I think that some of the ways that can be improved are through designating large chunks of land, including federal land, to be developed, and encouraging municipalities to do as the City of Victoria recently did—that is, to pre-zone as of right housing for non-profits and getting rid of the NIMBY third-party rights stuff.
I have lots of opinions about changing zoning rules, but those can't be expressed within four to five minutes.