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Hi,

I have to buy and organize a videoconference system for this ambient:

A long and narrow hall, 90ft in length, 27 feet large, downsloping, with the podio in the upper side. There is a projector screen up above the podio and a little room/area right behind the podio.
The screen area is 15X2.3 ft for 34,5 sq ft, and the projector has to be placed on the opposite wall, at a distance of 90ft.
My question is, what type of projector would be the best for this room? I know it has to be a tele optic lens because it would be really far away.
At what height should be best placed? How much would be the best quality/price system?

thank you a lot