A car rental website looks simple from the outside: pick dates, pick a car, pay. Under the hood, almost every problem comes back to one question: is this car actually free for these dates? Get that wrong and you get double bookings, angry customers at the airport and a team that stops trusting the website.

I'm a freelance WordPress and Flutter developer in Famagusta, North Cyprus, where a lot of small rental companies still take bookings over WhatsApp. Here is how I approach a booking site for them, from a developer's point of view.

Model the fleet, not just "products"

The tempting shortcut is to treat each car as a WooCommerce product with stock. It breaks quickly, because rental stock is about time , not quantity. I usually model it like this:

Car group (e.g.…