It's the first real end-to-end product I've ever built myself and I gotta say, it's a lot of fun. I had to build a ton of custom infra and adapters to connect to the various, disparate booking systems in order to find cancellation.
Definitely pushed my capabilities.
Hope this helps some of you finally land a trip you've been wanting to take.
Edit: I've created a forecast model for openings which has been quite accurate at a 7 and 14-day timespan. Next year I should be able to make this the backbone for predictive alerts. https://permitsnag.com/permit-forecasts