for Mrs Weaver being able to see guests arriving.
Monitoring cameras have been something I've been looking at for a while, but as yet I don't appear to have found anything that satisfies my needs and budget. I definitely do not want to have to pay for cloud based storage which seems to come with a lot of them.
I highlighted the above quote, because you also said
I was thinking of having a baby-monitor type camera by my bed
What you may not be aware of (apols if you are) is that you may need 2 different types of camera. The internal ones are no use for external monitoring of guests arriving. I myself at one point thought I could perhaps get an internal camera and point it through the window. Apparently whilst this may work fine during daylight, at night the glass will reflect the IR so you won't see anything... this is something most manufacturers don't make purchasers aware of.