I understand that sometimes we don't always have the money at the right time to get in on everything we want. But, as Elrick said above, be prepared to live with the regret that follows. As a personal example, I steered MiTo into making PuLSE a very nice contoured SA profile group buy keycap set. I knew I had to buy it, after I had gone through the effort to ensure it would be a great set. So I ordered a set. At the time, the Green Tea set was running concurrently, which I really wanted as well. However, I was strapped for cash, and couldn't afford both. When the sets started shipping, I immediately regretted not buying into the Green Tea GB. I was able to pick up a base set and mods later, but I am still searching for a SmallFry kit for my JD40. I should have sold something to pay for the Green Tea set when it was available.
These will likely never be made again once this GB ends. This set seems expensive, because everything is in one kit. But look back at your previous GB purchases through PMK, and you will probably find that you spent as much or more on a single GB purchase, after you ordered all the child kits you needed.
So, my advice is don't miss out on this, if you have even a passing interest. Contoured SA is very nice for typing. SA keycaps are THICK and beautiful. This set was well thought out by BunnyLake and me to be one of the best sets ever made, in a colorway that both reminds you of the "old" days of computer terminals, and is representative of Geekhack forum colors.