You cannot deport a citizen of the US. The whole point of "citizen" is that the US is your country now. You can't kick someone out from the US to return to the US. You also cannot seize someone's private property for committing a crime. That would be unconstitutional. And politically, I think that even the most diehard Trump supporters would have a major problem with this. If there's one thing they hate more than illegal immigrants, its government ownership of land.
As for the rest, I don't know. The one problem Trump has is that his initial hardline stance on no amnesty is what got him here. But he also knows it is problematic. I don't think he is that much of a hardliner himself, but it always gets him a big round of applause from the audience so he rolled with it. He had that strange townhall meeting where he seemed to be taking a softer stance and even asked the audience what they wanted. Then he reversed again because some of his base were irate. Now he's just kind of avoiding the issue.
The reality is, that just like his wall, it's completely infeasible to get rid of all the undocumented aliens in the country. And most Americans and even many Trump voters realize this. They liked the "tough talk" more than they thought he would actually do it. But the insiders he has surrounded himself with, and his most hardcore supporters are nuts about this issue. He's in a bit of a pickle on that one.
Amnesty is absolutely off the table, I think. Especially if Kris Kobach remains in his team. How many people he actually ends up deporting is the question.
In the US they have Civil Forfeiture where convicted drug dealers are stripped of cash and property if they can not prove any other income that can explain the cash or property. last year they took $12 billion so they are not shy in doing this. The illegals is as you say a whole bag of poo, pretty much the same as their stance on abortion- half the population will love them and half will hate them
Harsh. Very harsh...probably fair though.