I purchased a Generac RD030 diesel generator with a 132 gallon built in tank. Very expensive, but will put out 30k watts. Also, I purchased a 500 gal tank too! Now I am ready for whatever comes! I hope!
You know that diesel fuel only stores for about 12 months?? Good luck getting that gen to run for very long.
Buy yourself a diesel truck or car for daily driver and fill it from those storage tanks or otherwise your screwed.