I've made a bunch of these, and I'd say 90-120 minutes if you have a good shovel and good evergreens with low greenery. They would have been much better off showing how to go into a and improve a tree well, which is what I usually do winter camping these days.

I REALLY like the "stay out of thick forests" recommendation. With this being a family friendly forum, I'm not able to say which rude gestures were directed at my computer monitor at that idiotic utterance. Although on second thought, I actually do like it. Keeps fools out from under my feet.