Have at least 20 or so tents scattered around the garage and shed and yet I still finding the need to buy a new one to build a more ultralight hiking/travel kit.
I think there's a lot of variables especially how they will be used and transported to the campsite. Half of the ones we have are those oversized 2-3 room plus sunroom style which are good if hauling in a car and planning to stay a while but they do take a long while setting up and packing down. My preference would be having a few small ones so other family members or friends can set up where they want and everyone having a little more space and privacy at night and easier/faster packing. Time in the outdoors is always fun.