Lighter weight leathers can be sewn on home machines, but the tough stuff requires commercial or industrial sewing machines. They can be tricky to set up and operate, but can't be beat for production work.
Latigo & Harness Leathers are treated with waxes and oils to resist water and limit stretching. Garment leather is not just from cows, it includes deerskin, pigskin, goatskin, sheepskin, suede/splits, and other lightweight leathers. Upholstery leather is heavier weight and may require a commercial machine. Rawhide is not tanned, and has excellent properties for forming. It is not the leather your shoelaces are made from. Vegetable tanned leather is the only type of leather that will absorb water enough to stamp or carve.