Easiest way to keep the rodents out is scatter mothballs all over the place. I do that, my neighbor doesn't. I have a garage bereft of mouse turds etc & also put some mothballs around the outside of the house to stop them moving into the home
Neighbors place is over run with em...mice, chipmunks, ground squirrels, gophers etc etc.. Looks like Wild Kingdom on his side of the fence..