Apartment hotel company needs XML feed to 3rd party websites

We are an apartment hotel company in NYC. We rent out our 200+ apartments on a nightly, weekly, or monthly basis. We get anywhere from 50-100 reservations per day, and are growing rapidly. We work with many 3rd party travel websites that book our apartments for us, and are looking for a way to have an XML feed to their website so they can see our calendar with real time availability and rates. Meaning we want these websites' customers to be able to book apartments directly on those websites. In order to do that those websites have to have real time calendars that shows them whats available and what's not at all times. As of now we have to manually upload availability once a week, and none of those 3rd party websites have the ability to make bookings directly on their site without asking us what is available. We us Innroad as our booking system, and we need this project done within the next month. Please bid, thanks!