This is also how we started a while ago.
I agree that it's too expensive, hence we're working on making this scalable and cheaper now!
We'll soon launch, but here we go! https://expand.ai
I’m curious to know more about your product. Currently, I’m using visualping.io to keep an eye on the website of my local housing community. They share important updates there, and it’s really helpful for me to get an email every few months instead of having to check their site every day.