get a couple of these:
WiFi Hidden Camera Power Bank 10000mAh, 10 Feet Night Vision Distance,HD 1080P Nanny Cam Portable Charger,Remotely View Real-time Monitoring
paired with a weather proof box . in my case a Tupperware container
some cable ties and a usb charging solar panel https://www.wish.com/product/5d42a4193749290bf45eb066
set these up so they pick up the main approaches to the property, in trees, or on buildings and camouflage them appropriately.