@revelette1,
That is a good question. I think I have already explained my opinion on this, but I will say it again.
I think that the key will be Senate Republicans. When they start defecting, Trump will back down. I think they are already pushing on Trump privately, and three Senate Republicans have so far made public statements implying that the shutdown should end without the wall. There is no reason for the Democrats to back down (and quite a bit of pressure not to) unless there is DACA/TPS on offer.
Trump is acting like Trump in public. There is unquestionable pressure on him and on his administration to end the shutdown. He does care about polls and about public opinion, and the people around him do too. As the TSA starts having very public issues with employees getting sick (or now just quitting), the pressure ratchets up on Trump.
Are you predicting that this will last "months" without an end? I don't think it can. Something will break, and the cracks are starting now.
This is why I think a "National Emergency" to get wall funding, combined with an CR to fund the government (without wall funding) is the most likely conclusion. Of course the Emergency will be challenged in court.
But yes, the pressure on the Republicans is growing... and something will give soon.