This DIY video shows how I attached a home built projector mount to the ceiling. Part of this video is also a review. The mount attaches to the floor joists in several directions and is extremely stable. I needed and extension though and have put another Indestructable video up on the extended project.
The wall screen is just white latex paint with a border made from black duct tape. If you take your time with the tape lines and paint it will look really good.
Thanks for watching.