Be sure to check out these useful links about escaperoom business models:
The Unbelievably Lucrative Business of Escape Rooms
French, S., Marmor Shaw, J. (2015).
Read it at Marketwatch (link)
Peeking behind the locked door: A survey of escape room facilities
Nicholson, S. (2015).
Read it at at Scott Nicholsons' website (link)
How to open your own Escape Room: simple 22-step guide
Bulgarina, C. (2016).
Read it at Now Escape (link)
Are you considering using home automation devices or microcontroller interactivity?
Be sure to read about the concept of "graceful failure".
Technology failure in Escape Rooms
Martin, N. (2016).
Read it at PuzzleBreak (link).
Free stock pictures, movies & music for commercial use to quickly get started.
Royalty free fonts
Available at 1001fonts (link).
Royalty free pics
Available at PixaBay (link)
Royalty free background music
Available at Incompetech (link)
Create your own creative content using various tools.
Adobe Creative Cloud
Check out the monthly subscription plans for student use (link)
Andrew Kramer (Super8, Fringe, many more) teaches you all about 2D effects
using Adobe After Effects (link)