DH (and DSs and SIL and, in fact, mostly everyone) mercilessly takes the piss out of my buggy obsessions....but I know I'm just a small fish....so...gonna write my buggy train (as I remember it) and invite you to do the same 
in my defense (not that I need to defend myself) I have 3 DCs and all my buggies have been needed for various functions at various time, and Ive never had more that 5 at a time.
So.....
Quinny Buzz
Maclaren Quest
Maclaren Techno (1)
Mamas and Papas Pliko
Phil and Teds Sport
Maclaren Techno (2)
Maclaren Triumph
Maclaren Techno (3)
Bebe Confort Loola
Bugaboo Bee
Number of years = 4.3
Number of buggies = 10
Number 0f children = 3
Sooooo
Buggy Quotient = (10/(4.3x3))=0.775 buggies per child per year.
10 divided by (4.3x3)
Acceptable yes????
0.775