Web application for availability calendar work calendar

Management service for vacation rentals. I need a web application / webpage that can read in ICS calendars links from multiple different sites for a single unit and merge the ICS calendar files , parsing out some of the information and then create a new reservation availability ICS file for the Unit to be read into a calendar. I would like an interface to add the unit name and the different ICS links Interface with the ability to assign the units to ICS file for a work calendar for Ability for have a ICS file of all the units for a combined ICS availability calendar I host the site in WIX now but I could move to OVH host platform