Of course, in the past two years the Home Depot has been out of stock sometimes as well.
https://www.harborfreight.com/saw-mill-with-301cc-gas-engine...
An axe and a broadaxe and a chalk line (though people originally just used charcoal).
Making beams is not that hard, especially if you have lots of wood and not a lot to do in the winter.
Whenever someone says, I want to write X program from scratch. I’m going to send them this link.
This allows you to produce post and beam beams for personal use quite cost effectively -- they don't take that much time to saw, and the transportation cost is basically nil because you are going to use them on-site, and you don't pay the monster weight penalty to put them on a truck. You can't kiln dry everything, but you can air dry it, and it tends to be extremely good for construction. The waste can be burned in a wood boiler.