As with most edge cases, it really comes down to the content and purpose of the questions - not just the question's subject, but what it's really about. Any question that deals with the technical issues in using your camera is probably just fine, but questions that are really more about your house than the audio setup probably aren't. Based on your description, here are some example questions that might be good:
- What sort of microphone best suits a home-monitoring system?
- Can I run microphone cable across long distances (such as across rooms in a house)?
- Does there exist a tool that will record continuously and stream the audio digitally?
- For that matter, does there exist a tool that already covers this situation entirely, or do I need to be building this myself?
Shopping recommendation questions are off-topic here for the same reason they're off-topic on most SE sites: because they're usually lazy and too localized to a point in time with regards to the market. However, choosing equipment is a pretty big deal in audio and video, and you can usually reword these questions to be useful and insightful.
Say you need a microphone. Instead of asking "which microphone should I buy?" you can ask "is there a 'standard' mic in this situation?" or "what do I need to look for in a mic for this purpose?" Both of those questions invite explanation, not just one-liner answering. Often there is a fairly standard brand or type, and there's usually a reason for that. And if not, then the best answers are where someone teaches you how to find what will work best for you.
For example, take this question about multitrack recording into a computer. The asker didn't ask what to buy, he asked "what sort of thing should I be looking for, and how do I evaluate it?" The question got several upvotes and I've linked to it lots of times since the answer to that kind of question ended up being useful in a lot of other conversations I've had.
So yeah, you're probably on-topic, just make sure it's about audio/video production!