@Josh334
You would have 3 listings:
Listing one (Parent - combines 1&2)
Listing two child
Listing three child
Sync Listing 2 to listing 1
Sync Listing 3 to listing 1
Turn on Pro Tools so you can see all the calendars on one page
Be advised that reservations will automatically block the calendars correctly to prevent double bookings. However, if you manually want to block days for personal use, you must block all three calendars. This is intentional, as some Hosts prefer to block the smaller listings on weekends and holidays in the hope the larger listing gets booked first.
Multiple Listings
https://www.airbnb.com/help/article/1864
Pro Tools
https://www.airbnb.com/help/article/2499