Please vet my startup idea - Book cheap vacation rental property

The idea is to have a chrome extension to find the same property on different rental platforms & original listing agents' websites. So we can compare prices and go to the website with the lowest price.

The context: For the same rental property (based on the pictures), Airbnb and Vrbo show different prices (daily price * number of days + service fee + cleaning fee + tax). Different fees and taxes make sense, but the daily price is also different.

One hack to save money is to get the original listing agents on Airbnb and Vrbo listing pages, and use Google to find their websites. This way, we can book the property on websites as they charge a lower price compared with prices listed at Airbnb and Vrbo. The idea is to automate this process to make the booking experience easy and save money.