There only needs to be one Republican in the house who doesn't like the bill, and we already know that Trump doesn't do even a little bit of bipartisanship (nor I doubt he will start in this next term).

He only has a couple of years to pass bills also, it is unlikely that the Republicans retain control of the house after the next midterm (unless Trump is popular).

I'm seeing 219 R to 215 D, by the way, and the one remaining vacant seat will probably go R again. Unless I'm interpreting something incorrectly(?), it doesn't look like a one-seat majority. Still more narrow than it was in 2017, as you said, but not quite that narrow.