To this i would just break it down, i mean you're averaging 4k a year which isn't really breaking the bank for a decent earner/saver!
Another thing i've been thinking recently: if i've amassed 150 toys in 4 years, and i keep this going... my house will be seriously overrun with toys.
I know you've got the big collection room, but have you given any thought to what happens in 25 years from now when your collection has doubled?
Shame you can't charge the toys rent! At some point (when it's more like a theme park), you could charge admission i guess!