The new Chinese New Years buildings cost a total of 290 flooz, and have to be bought in the next 28 days. I'm pretty sure that's impossible to reach without making an IAP, especially with their new economy. A lot of the ways you could get flooz while playing the game now only give you coins.
It's probably doable. 3 from friends visits, 4 from the Dungeon if you re-stock twice, (at least) 1 from the lucky spin leaves you needing just two from the excavation, fortune wheel and Pepin requests. Get those ten or so daily and you're basically there. Plus you'd get a few from levelling up and doing level-up quests.