If Trump can build a wall and have Mexico pay for it, couldn't he buy us all houses and make the bank pay for them?

Build the wall. It won't solve America's problems. Inner city poor blacks and poor whites are not going to fill the jobs in the meatpacking, farm work, and hospitality industries. Too many jobs to fill, and many urban employers complain about the lack of work ethic of inner-city residents.

You couldn't take care of a house.

it would either fall apart or you would lose it to the state because you didn't pay the taxes.

No wall has been built and Mexico hasn't paid for it.

If Trump gets elected he promises a Mexican in every garage.

If you don't have a garage though, he will classify you a Mexican.

Trump is not a Liberal Socialist, your thinking of Sanders.

Your question sounds like two questions. How are they related?

both are equally likely Zero probability

Typical liberal wanting something for nothing. How proud your parents must be loser.

you can't nuke the banks