Sorry to double post, but I really thought on both of those for a really long time. I read a lot of people's opinions and I went Mythic Research Center THEN Cabbage Hut. There are a few "cheaper" creatures you can craft like the Golden Peacock (I made 2) that help build up gold items which can help you in future events. I saved up forever and ever for the Cabbage Hut (and am saving gems for a hopeful Black Friday/Cyber Monday discount on the gem Cabbage Hut). I think that's a really efficient way about it. Maybe you don't decide on that route, but I'm pretty happy with that order. Definitely read up on other's opinions as well because they helped informed my opinion.
I've been able to get 1 alicorn and a 1 faerie fountain from my cabbage hut, but I think going the Mythic Research Center and Golden Peacock has helped me more for helping out with events (the chance for gold drop) enables me to do more extra adventures/trades to speed the event along. That's my take so far.