How would I connect multiple vacation rental's channel managers onto my OTA website?-Forum-Culture Informatique

That’s an interesting question. Many OTAs (especially large ones) connect through direct integrations to most popular channel managers. But that would be a time/resource consuming process. These days, I’d put my bet on a single integration to TravelgateX, which brings many simultaneous XML flows from rental/apartment providers. But although there are a few specialized channels in such connection, others should somehow “filter” the rental product (as they carry hotel product too). Besides, a commercial agreement should be in place before connection to each channel, in order to get first test and then live credentials.