Neighbors MASSIVE dog keeps pooping in my yard [simple, cheap camera recommendations?]

Hey my friends, I want to catch the mysterious neighbor who keeps letting their dog poop in my yard at night time.

Looking for a cheap, motion activated camera with a memory card or wifi connection, that runs on a battery or plugs into an extension cord, with now subscriptions or monthly fees, etc.

Would a game camera be my best bet? Or surely there is something cheap on Amazon I could use?

Thanks in advance for any help you can offer!