What is weird to me about her proposal is that they talk about 3m homes but that is the normal number of housing starts in 4 years. Do they mean they will doubl

What is weird to me about her proposal is that they talk about 3m homes but that is the normal number of housing starts in 4 years. Do they mean they will double it or are they just giving tax incentives for the expected home construction so they can point to it and get credit?