My customer went to them 1 month ago with property criteria and was told they could do the loan no problem; only to be told days before closing the property does not qualify.

You can not go wrong with the product or the customer service they provide.

WordPress, especially when paired with plugins like WP Rentals or a property management system, offers more flexibility for custom features like dynamic calendars, booking systems, and integrations with platforms like Airbnb.If you're planning to grow beyond a few properties, WordPress can handle that expansion better since you can continuously customize it as your business needs change.

They want someone who is going to treat their employees and their customers well.

That is a good plan and what many of our customers do. 

I wrote to BP customer service and they confirmed that the app doesn’t exist any longer.

Also, would you be willing to message me a link to one of your Booking.com listings so I can see the format, etc from a customer point of view?

What should I look out for while writing my contracts and explaining them to customers?

As a contractor I had to work for money, be at the mercy of the customer, jobs and timelines never seemed to go as planned, only to pay tax on the money I worked for.

High end customers will require Concierge services.