Just installed (2) types of out of the box wireless cameras systems (wired and wireless). Budget & deterrence is the factor. Eufy by Anker was $200 for 2 cameras, $150 for wired flood light cams. These are good and the newer versions/models had facial recognition that snap shots zoomed in faces and sends those faces to your phone which is better than a screen shot of the entire screen because you'll end of going to viewing footage on other notifications (something is at side gate). There are wired simple Wyze Cameras that go for $25 + $20 if you need longer cables to power the unit or weather proof housing. If you can hide them under the eaves / under protection, you're good. Add $12 memory card each camera, completes the system. So I spent $800 on (4) eufy cams , solid, easy, good tech, $180 for (6) Wyze Cams.
You'll need to decide if you require high def/high quality cameras and which location. Mix high quality with general quality to build a system. Yes it would be great to have 1 system but they both do what I need and I didn't spend $1K. Also would you have more coverage/cameras or better footage? Having both increasing the price. I'd use that extra savings for other issues on the property.