I am in the US and work with a couple of local companies that donate monitors as they switch out to new ones. I also work with a local group that ships on a container to Haiti that cost me roughly $3.50 to $5 a cubic foot. My group was given 80 older style 19" Dell, some keyboards and mice that really cut my cost down.
We looked at projectors for the classrooms, but with very limited electric and everything running on solar, this is still down the road. Also taking into account the bulbs and the classrooms have a lot of light with open windows that would need to be covered and increase the heat.
I am not sure where you are or working in, but connecting with business and show them what you are working on and the goal of the project, you may get some needed supplies.
Good luck in your search.