Yep, I’ve been in your shoes! Last year, we rented from https://rentforevent.com/ny/video-rentals/tv-monitor-rentals/ and they were great. We went with a 55-inch screen, which was big enough to catch people’s eyes but didn’t take over the booth. They also helped with mounting options—floor stand vs. wall mount makes a difference depending on your setup. Also, check if your content is HD or 4K so you get the right resolution. What kind of videos are you showing? That might help determine the best screen size.