Niche Search Engine for Accomodations

I’m starting a niche travel site for accomodation bookings (most of the accomodations are not yet online).

I was curious if there might be a hotel/accomodation search engine that I could purchase (or get custom developed) that is scalable, robust, and customizable into multiple languages?

Additionally, does anyone know the economics behind travel sites? I know there are many that offer hotel/flight bookings through their own or licensed booking engines…but any hard numbers of the economics of these niche travel sites that offer bookings would be appreciated.

There are a number of services that offer up data through their api. You just need a programmer to write some code to use the data. Here is a big list: