I got a video baby monitor, I was going to run an extension lead to the shed but the camera has a battery pack, although I had to spend extra on rechargeable batteries cos they don't last very long! I did spend quite a bit
it's a Summer Infant touch screen model and was £160 (got it from catalogue so I can pay in installments! Can prob find it cheaper elsewhere) It's a good monitor though and I'd recommend it (for babies or bunnies :lol
I can get a signal in my bedroom that's at the front of my house upstairs, and the shed is at the far end of my back garden and obviously there's doors between!