25 for $20

So I have my little guy Eddi, who was weighed about an hour ago at 136 grams. During this last feeding I switched him from fuzzy to small adult mice, and my goal is to switch to rats when he get to about the large adult mouse size. I am going to a reptile show in May, and I wanted to stock up on mice so I could save some money(at the show they would be selling them for about .60 cents each versus the $1.25 I pay now) but the only thing is they sell them in groups of 25. Should I get 25 small adult mice or should I get a different size and just have them in the freezer for when hes ready?

Here is the site of where I would be buying the mice/rats from:

http://www.glacierrodents.com/

Thats probably fine. Once he gets too big for a small mouse, you can feed multiples until they are gone.

Why not switch to rats now? I had personal experience and have seen others have the same where they buy a bunch of mice, test out a rat and the snake takes it on the first go... then you have a bunch of mice you don't want to feed for fear of them deciding they like the mice better.