Two questions for you...
1) Do you need all those services?
If you're using Beatsource and Beatport, your music is all streaming. What is the need for rekordbox cloud? Do you need the ability to sync your library to other devices? If not, you can still sync to your mobile for free over wifi. And do you have to put your entire collection on Dropbox? 2TB is a large amount of storage, do you need to have ALL of your music online, or would using the free plan to put some of your music online suffice?
2) Do you get paid to DJ?
Current situation notwithstanding, do you ever get paid as a working DJ? If so, then all of these things you've just listed are tax writeoffs. They're legitimate business expenses you can deduct from your income.
Oh, and if you find you DO need the full Creative plan, if you lock-in at the current rates, it's £9.99/mo so long as you keep your subscription. That's another £5 in your pocket every month.