160x120 resolution isn't great (320x240 is generally the "good enough for casual night imaging" resolution), but those are the best you can do before stepping up to a minimum of $500+ per image sensor (seek compact pro).
Here's an image set of a cat walking around a fenced-in deck next to a tree: https://imgur.com/a/WmuQ1lA
If you look carefully in one image, you can see the heat from the paw prints remaining visible as a line in the grass. You can't see the actual prints at that resolution, but the sensor is absolutely good enough to see trails like that, especially indoors with footprints.
And in terms of intensifier tubes, you can do reasonably well picking up one of the Gen 1 monoculars sold all over the place, somewhere around $150-200 per eye, though you have to be careful as some of them are better than others.