I think this can be done, but I don't know exactly where to start. We do the presentations with EasyWorship software on this Dell laptop. Currently we are using VGA cable to an overhead projector and want to change the display to three TV/monitors. This laptop only has one HDMI out for cloned or extended desktop display. Running the "getting more aggravating everyday" Windows 10.
I know we will need to buy two or three monitors (have one that might be okay), but there is some sort of "network" that would need to be set up and the TVs would have to have receivers. It seems a trip to the electronics hardware store is going to be needed and possibly somebody that knows what to do to make it work.
Advice is welcomed if you have any experience with doing this king of thing.