Cage Questions

So I am in the market for a new cage for my fuzzbutt. The only problem is, I don't know how much room I am going to have in a few months, but I need a new cage ASAP. I already know I want the ferret nation but I am having trouble deciding whether or not to spring for a double unit or stick with the single, and if I need more room buy the add on. I know that it is cheaper to buy the double in the long run (if I have the extra room) but i'm willing to pay a little crunch fee for the good of my chinchilla.



Basically, for a single chinchilla, should I stick with the single?



Thanks



Chinchilla kisses,



*Chinderella*