What is the smallest add-on you can do?

[DisneyKidds]

Anyone know? Thanks.

 

[Priscilla]

25 points.

 

[drusba]

25 points if paying cash, 50 if you want to use financing, and 100 (at VWL) and 50 (at VB and HH) if you want to use Magical Beginnings.