A one-off build fee, scoped to how much of your operation the system has to hold. A booking tool for one location and a system running four departments are not the same job, and pretending otherwise with a headline price would only mean quoting one of them wrong.
A monthly, which is not optional. It covers hosting, the database, backups, security updates and a defined amount of change work. Software that nobody is paid to maintain quietly becomes a liability about eighteen months in, and we'd rather price honestly for that than discover it together.
We don't publish a figure because the honest answer depends on the first conversation. Have that conversation and you'll leave it with a real number — not a range engineered to get you on another call.