Inside Facebook we have 2. TripAdvisor and Where I've been. Both of them require you to manually add your places on the map which is little bit different than Mentaway where everything is automatic.
Assume an eCPM of $8 (I think that is good performance, but still a "safe" number to work from). For perspective, I write about personal finance and tend to get a few more dollars than that.
Work backwards from there.
To make $100,000, at an eCPM of $8, you will need: 12,500 thousand impressions, OR 12,500,000 impressions. If each visitor has 10 pageviews, you need 1,250,000 visits. So, each month, you need to get 104,167 visitors.
Of that $100,000, how much goes towards costs?
Just a thought exercise!
How are you going to attract visitors?
That said, you've already made it this far which is a great firs step. Good luck.
To make a million/year, you now need more than a million visitors a month.
Ad based models (solely) are tough.