Yes, we recommend to cut equally from both sides and keep as many holes for wall spacer as possible.

It includes full barn door hardware set, 1 handle and 1 floor guide. Soft closing and lock are not included.

Yes

Yes, it's water resistant and can be used in bathroom, laundry or other humid environment.

Normally, you can install the barn door hardware directly. However, if you have a non-concrete or drywall wall, you will need a header board