Around here, if you don't have a functional Sunday School, you will not have a church for long. This project will make the Sunday School untenable. After that, it is just a matter of time before the congregation fails.
Then the developer will be able to pick up the rest of the property for a song!
If the hotel management people were smart, they would offer them space for Sunday school in their conference rooms. It is rare that hotels will have conferences going on at the same time that Sunday school is held.