A piece of "high carbon" flat stock plus a table top grinder, add some patients and away you go. From butt to tang, bolster and blade, all ground to shape on the grinder
Tempering is best done using a forge but can be accomplished with a torch. Best to have a good tempering chart to know when the steel reaches the precise temp to dunk it in the oil.
Important to use "high carbon steel" which most knives do not and is why most knives today... suck.
2nd rate makers today, promote "stainless steel" which requires constant sharpening because they lose their edge so easily. To boot, the stupid things are difficult to hone a keen edge.
With high carbon steel it's a few passes, now and then on a wet stone, steel, or strap.
Some food for thought, dishwashers will take the keen edge off of any highly sharpened knife when using dishwasher detergent. Dishwasher detergents often contain corrosive alkaline salts. A keen edge is very thin.
About that high carbon steel.... industrial hacksaw blades were the sought after material, back in the day.
Handles.... buck horn, of course. No rivets just A bit of epoxy is all that's needed.
It's worth the patients.
P.S. Some files, emery cloth and a buffing wheel come in handy too.