Just a little comment regarding vehicles. Most riding mowers (especially the cheaper ones) are still equipped with carburetors and mechanical ignition and should continue to run OK. Some of the high dollar units with EFI might fail but the cheap and older ones should continue running. I have a couple of those so that will provide we with some transportation. The new UTV that I just purchased has EFI and a computer, most likely it will die. I also have several older cars (70s and one early 80s) that hopefully will continue to run. I think everyone will be surprised how many cars will still be one the road. Just go to a classic car, car show, and see how many of those things are still around. On my street, over half of the houses (including mine) have some type of classic collector cars. I just noticed a neighbor has acquired a beautiful 63 Ford Galaxie. A close friend of ours will be picking up his original 67 Camaro any day now. Restored to original condition with original carburetor and point ignition. Neighbor across the street, has an older Camaro drag car. May be noisy and hard to drive, but with a carburetor and mechanical ignition would continue to run for emergency usage. It would be interesting what people would be using after an EMP kills the newer stuff.
PS, wifey actually would be happy if we went back to horses. Maybe then those things will "pay back" some of the expenses.