Here’s what I did a few years ago. Short mowed my 5 acres, took a blade on my tractor and scraped around the perimeter. The fire occurred during a long dry spell. There were high winds forecast. When the fire started, we were already under high fire danger and I had done the prelimary work around my 5 acres. Mowing all but eliminates the fuel that would have been available for the fire. The fire essentially jumped my property and lit a field of broom straw about 1/8 mile east and burned everything.
Your trash pump idea is a good idea If you have the water supply but you will be limited with what you can keep wet. Your home roof will be the first priority. The chicken coop and run would have to be soaked. Many times people will release there larger livestock rather than trap them in a barn or corral to give them a chance to escape.
The best thing you can do is get any dry fuel (grass, limbs, etc) away from what you want to save. Eliminate the fuel and you reduce the fire risk. That’s why we have controlled burns in the region to elimínate the undergrowth and brush in order to reduce major fires. Canada and Maui didn’t controlled burns or any other mitigation and the results are what they are.