Thats hard to answer, some folks might be streaming video, some audio, general surfing, or slack. dont forget about background updates. I’m pretty sure that RPI wont have the horse power to support 50 clients at once. The only way to really know is to test it. The configs are easy to backup and move to another system if it doesn’t work out. I personally would find an older desktop like an I3 which can be had for cheap and slap some nics in it and just use that.