An Airbnb revenue forecast is a month-by-month projection of occupancy, ADR and revenue for one property, set beside comparable listings. Buyers use it to test a purchase, operators use it to check an arbitrage lease, and hosts use it to set targets for a live listing.
What I plan around in Sintra: Pena Palace and Quinta da Regaleira; Guincho beach surfing; Lisbon day-trip overflow; Sintra UNESCO cultural landscape. Guests I price for: couples and culture-led travellers on 3 to 5 night stays around Sintra's historic centre and the Cascais and Estoril seafront. Where I start: capturing Lisbon overspill at calmer coastal rates, Alojamento Local (AL) registration with tighter rules in Sintra's historic core, and shoulder-season strength that softens the winter dip.
I set up your pricing with spring garden season, summer beach weeks, the Estoril Open and the festive nights as separate bands, plus three-night minimums where couples typically stay that long. All three channels, Airbnb, Booking.com and Vrbo, carry identical stay rules, cleaning fees and municipal tax.
The service in general is described on my airbnb revenue forecast page; this page covers how I apply it in Sintra.