You can also play "Bra Upgrade" using the same basic idea. The difference is bras are expensive! So I recommend only keeping 4-10. Also, even though you will build and upgrade your supply using the same rules as panties, I recommend only upgrading every other week or maybe once a month (on extreme week maybe?). That will keep your costs down.
Also, I have a different plan for how you'll wear your bras during the week ...