I'd personally love a travel site that aggregates Airbnb & VRBO & Hotels. Listing everything a city has to offer on a single site could be a real differentiator to sites like Kayak.
Tripping is the top metasearch site for vacation rentals with over 1 million homes worldwide. We also have the richest data set in the industry, so it'll be fun to see how our data compares with BeyondStays.
- Hotel metasearch is a real-time pricing and booking option. VRBO and AirBnB by and large are lead generation based so you don't have real time availability on a majority of the properties. This means that a lot of the listings may already be booked and you wouldn't know until you contact the owner.
- Location accuracy is a challenge. Home owners don't want to provide exact addresses due to privacy reasons so for a lot of properties, owners have chosen to provide an "approximate" location which leads to a lot of properties in a neighborhood sharing the same exact lat/long and a lot of stacked pins or clusters on a map.
For reference, here's a general idea of the number of property types: 300,000+ hotels, 550,000+ vacation homes, 300,000+ airbnb listings (lots of cross listing with vacation rental sites for sure), 50,000+ hostels = ~1M properties bookable after deduplication.