By the 3rd year of the zombie attack, I’ll probably have run out of ammunition and will be a zombie anyway.
If you had bacon to offer, you could hire guards with their own ammunition...
It’s funny. I tell my sister that when the zombies come that she is so ill prepared that she should just walk into the middle of the street and lay down.
Big difference between the third year of a zombie attack and the third year after a zombie attack.
My best guess is that week #2 after SHTF will look ugly, and a lot of slow-moving zombies will be spotted - and eliminated. Surviving slow zombies will be like a video game in which you rack up points on easy targets with a 99% chance of survival per encounter if you are prepared. The second wave will be larger numbers, better organized, and experienced zombies, and that will be like a much higher level in the games, where even an 80% chance of survival per encounter depends on working together with neighbors and doing everything right on your home territory.
After a month, I don't expect zombie sightings on our home territory to be any more frequent than they are today, and much less frequent after three months. By that point, those who raid homes will have disappeared through natural attrition or switched careers after too many close calls. Then the issues will be the classic ones of grifters, highwaymen, piracy, and perhaps slavery (even if technology takes a step backward, which is not a guarantee, we will still have boats and wagons, with trade along roads and waterways). We still need several years worth of ammunition or reloading capability - venison provides a whole lot of meat for one shot - but I don't expect daily zombie attacks to last very long at all.