I'm glad to see you sharing value from the get-go, really appreciate that.
I would argue though that this is pretty standard information. If you're getting real-estate leads for $1.5, with those bare minimum settings and targeting - you're getting crap. Unless you convert these by automation, the time spent per lead isn't worth it (from my experience, I've been wrong before).
Here's result of my job recruitement leads. 75%(!!!!) percent of these converts into a job position. I pay roughly 50 SEK ($5.5) per lead, and get paid $120 per recruitement.
Real estate is MUCH higher than $120, which makes me question your lead quality. I may add that directly after the lead comes in, I've built a bot to send the data to their HR-department which calls them up 30-45 seconds after form is submitted, hence the high conversion rate.
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And here's my Black Friday competition results, which actually is included in my journey here on BHW (including ad copy etc).
That translates to approximately $0.05 per lead, but with even more niche targeting than what you write up.
I'm not saying you don't know your stuff, but even though it may be a beginners guide, you need to go into depth on some parts because else you/the readers are gonna lose money.