So for my use case, I want to put this on my website, my blog. I think the Tier 1 or 2 would work, but I want to make sure that for the directory items I am able to put it on my site with a widget/url. Just want to confirm the 5 sites aren't restricted to having only 5 people IN the directory.

I am not looking necessarily to sell to people to create listings, but more of a "referral source". I am a realtor and this would be a great way to share resources in one place.