Being a collector has the issue that all that stuff needs to be stored somewhere. Preferably on display as surely you want to show and enjoy your collection instead of just storing it somewhere put of the way, out of sight.
Of course there are different things to collect. Some of them take less space than others. My biggest collection, MtG cards doesn't really take that much space. It's a couple of cardboard boxes and binders, not that much to show off. Even if I wanted to put them on display they probably wouldn't take thqt much space. At least the ones worth displaying.