Besides blanket tariffs that make everything more expensive, letting Americans buy less stuff, there will be job losses from retaliation, and less money to buy other stuff.
There is unlikely to be mass reindustrialization of the US in the face of low demand, and not being exportable products due to retaliatory tariffs. Deporting 10m people will harm housing and banking and tax revenue and other demand for stuff.
deportations would have that effect. More empty housing.
The concept of a plan for mass deportations is I think the red states volunteering to pay for it all. Due process would make it expensive, and back up the courts to prevent other prosecutions in those states. If it is just round up brown people in trucks and drive them to Tijuana, then it could be cheap and quick.