I'm wondering how you find the time to keep making all these different bases not to mention the storage space, wish I could invest more but I'm finding my curry time increasingly short 
I think that having no particular hobby's and crap TV reception, combined with the fact that I only have to feed myself, allows be a fair amount of curry time. I like curry and I don't get bored of it, so I make it a lot.
That said, I only make around 1 base every few weeks and freeze it. Once I'm bored of it, I give it out in cheap tubs to my dosser mates, along with all the spices they need ground up into one mix and tell them to just get a pan with a fair bit of oil really hot, cook half an onion, stick the spices in, stir like hell and add some cooked meat and then the base bit by bit without burning anything. They seem pretty chuffed with the results and say it's better than a jar. I try and keep it simple otherwise I'm pretty certain they wouldn't want it.
That clears room in my tiny freezer. Oh - and I live next to an Iceland, which I like to think of as my freezer, making my kitchen freezer a little roomier.