I don't understand collections like that.
Chris Evans Ferraris collection, yes. Small, focussed and all are ready to drive and are used.
Imagine the admin? SORN paperwork, MOTs, servicing, etc.
Then if you want to get one on the road....With almost 500 cars one person, working full time, could allow 3 hours per car per year. So you'd need 5 or 6 people to manage the collection.....!