Protecting your assets? Insurance.
Any contracting service is incredibly contractor-dependant (as you've surmised).
Single story home? Really look at making your own go-bag. Take a survival course, not because you'll be in the woods picking berries, but because you'll learn transferable ways of looking at the (natural?) resources around you and how you can use them to survive or thrive.
https://www.verlocal.com/search?&page=1&keyword=survival
Have a go-bag in your car and by your bed (that include emergency rations and bottles / jugs of water, clean underwear, a toothbrush, etc). I bought a few cheap pop-up tents when they were on sale at woot.com. You can bet I'll be happier during a disruption of services than my neighbors who don't have even a basic set of supplies put together.
My theory is: Odds of a severe earthquake in the next 50 years are let's say 1/50. Do you spend $100k+ on earthquake retrofit, or spend $20k on insurance that'll let you rebuild? (my numbers are completely made up, btw).
Well, you have to purchase earthquake insurance anyway, and a single-family home is "less" dangerous than a multi-story home. Look at pictures of wood-frame earthquake damage and figure out what your state of mind would be after you run outside and your house ends up like this:
https://www.google.com/search?q=wood+frame+earthquake+damage...
Figure out your go-bag situation, learn how to use it, take a survival course, keep lots of water handy, buy a tent, and then only worry about it in order to keep your supplies and skills fresh.
Since you have a house, also run a 55 gallon drum / trash can setup out in the back yard.
https://www.google.com/search?q=trash+can+survival
Hope that helps!