It took me a while to realize this, but you can buy audio software secondhand. Used software is the same as new software, but with a little patience you can buy your plugins for far less than their sticker price (usually about 50% off). Here’s a list of places where you can buy licenses; all of these are reputable communities with checks & balances to make sure you’re not paying for pirated software.
I’ve been buying from these forums for years now and I’ve only had good experiences; that said, make sure you pay through a service that allows disputes in case anything falls through.