Bali Villa Promotion Setup

I need help promoting my Bali villa on multiple platforms like Airbnb, Expedia, Booking.com, and others to maximize exposure. We have only used Airbnb for many years; however, the bookings have slowed down, and we need to use other platforms... (Budget: $750 - $1500 AUD, Jobs: Airbnb, Content Marketing, Copywriting, Digital Marketing, Market Research, Photography, SEO, Social Media Marketing)