I am so sorry Michael, you are having a horrible time so please try to be nice to yourself and don't be too hard on yourself.
Michael, a tip I was told by a pest controller was to fill your bait traps with unpoisoned wheat for a couple of weeks, then when the wheat is being demolished daily you switch it for the poisoned wheat. it does work well at taking out some of the more cautious breeder adults. live traps sometimes work better with the older ones too but your'll need an airgun to dispatch humanely.
They aren't easy to control. when they got into my outbuilding and killed my favourite chicken hens I ended up with all my chickens in the kitchen for a week while i literally crawled over every inch of building with weldmesh and concrete looking for every possible access point including roof. was a total nightmare to resolve and having nearly 30 chickens in house was far from ideal . They are suppost to not like smell of creosote so I've tried that in areas they have been determined at - not sure if it really works but maybe?
I know here its always a risk, we live near a builders/timber merchent who are not always on top of things regarding vermin. I cannot feed wild birds or we immediatly aquire the merchents rats. and I have to watch for signs of activity and be ready with poisons and traps at slightest sign. I also bait/trap if the weather changes as prolonged rain or a cold snap makes them try and move in.
Thankfully I have now encased anything remotely vulnerable in concrete or weldmesh but its a war not just one battle with rodents as well you know .