Let's take a look at the past. First, and then very primitive, Booking Engines were developed for airlines as early as in the second half of the 20th century. They have come a long way from back then - nowadays we can hardly imagine any alternative way of booking a ticket. More and more often, people tend to book online also other services, i.e. doctor's appointments or beauty treatments. A modern customer is accustomed to having a possibility get everything done via the Internet. The same applies to your business – if your not online, you lose potential clients.
Stop trying to decide what is more important, choose IdoBooking - the system that adjusts to your needs and your customers' expectations. Moreover, see for yourself that implementing a multifunctional booking system doesn't have to be expensive!