Daily VRBO Cost Scraper

I need a small, reliable script that can visit a specific VRBO listing each day, pick a predefined date range, and capture the total booking cost shown at checkout—everything rolled up, fees and taxes included. The end goal is to deposit that single number in json format.
The json response array I need in php.

The id of the listing as well check in check out dates and number of guests should be sent dynamically in variables.

An example link from VRBO is
https://www.vrbo.com/en-gb/p11101602?expediaPropertyId=83063005&chkin=2026-07-12&chkout=2026-07-19&regionId=5193&destType=MARKET&sort=RECOMMENDED&adults=3&children=
where:
listing id = p11101602
check in = chkin=2026-07-12
check out = chkout=2026-07-19
number of guests = adults=3