In multifamily real estate, lease renewal isn't glamourous, but it is essential. It's kale and cardio rather than a blockbuster prescription weight-loss pill — and the stakes couldn't be higher. High interest rates over the past three years have kept potential homebuyers in the rental housing market. Builders continue adding inventory to meet demand, but eventually — most likely by the end of this year — rates will come down, leaving an oversuppl ...