Agreed, oil is an insane option now. However, in 1972 when my house was built it was by far the cheapest. There were a lot of houses built in NH in the mid 1970’s that had electic baseboard heat. Most of those houses were converted to oil or propane in the 1980s or 90s. When I bought this house 15 years ago, oil was still the cheapest. It has only been the last 5-6 years that it has gone to a premium of propane.
When(not if)I replace my current furnace, I most likey will convert to propane.
If you can buy a used 1000 gal tank you can sometimes get your gas wholesale.
Used tanks are easy to find and quite cheap. You will more than save the price of the tank in lower fuel price the first year.