That's true, but the more than $2000 / month mortgage isn't something that's so easily overcome.

You comment implies that utility costs would be significantly lower if OP used 1930s technology, but I’d assume that using a wood burning stove to heat their house would be much costlier. Modern technology typically allows one to use resources much more efficiently, even if we tend to use much more of those resources.

The key is to use anything not just efficiently but sparingly. The heat may not be on at night, you can use thicker covers.

But the cost of wood isn't bad. The worst winter bills appear to arise from heating oil from what I've heard anecdotally, which is common in old houses in New England.

Your comment assumes heating an entire house to 60-70 in winter was normal.