The house we were in 5 years ago was snake infested down stairs to the extent that when I would go down to feed the dogs, I would have to sweep up flat snakes where they had crawled in with the dogs for warmth. Shadow our dog would just flop down on them. Any that got in her way were flattened. The dogs would sleep with 5 or 6 curled up along them. I didn't mind them crawling everywhere because they were harmless and I was aware they were there. I had to take precautions that none got in the washing machine or dryer.
They were everywhere. We co-existed till they moved on. I can also add we never had a mouse problem.