Interesting concept. However, will depend on how bad the SHTF whether you will be able to FIND welding rods, power to run the welder, power packs for the equipment, fuel, etc. Me, I got Mennonite neighbors. THEY know how to uses horses (which are self replicating, BTW.
They also need to have an engineer beat them with a slide rule on the design of their rollover protective structures.