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 Costa Dorada: PortAventura World and Ferrari Land; Salou and Cambrils family beaches; Sitges festivals, Carnival and Pride; Tarragona Roman sites and Barcelona day trips. Guests I price for: Spanish, French and British families on weekly summer stays, and Barcelona weekenders in Sitges. Where I start: Summer weekly rates, event premiums and Catalonia's tourist licence rules (HUTT numbers).
I set up the pricing tool so July and August weeks in Salou and Cambrils, the PortAventura Halloween and Christmas weekends and the Sitges event calendar run as separate rules, the Catalan tourist tax shows correctly in totals, and the quiet winter weeks get realistic floors.
The service in general is described on my airbnb revenue forecast page; this page covers how I apply it in Costa Dorada.