Yes, I started it as Ottomans, but never finish it (I believe it can´t be done during the demo, but who knows). You need to boost your stability to at least +1 (from -3) to make it move and than it would take 99 months to finish. And you get some modifier which triples your stability cost. This is the reason why it takes so long. But once you are secured on your stability (0, maybe even 1), you are fine. You can still invest your new diplo and mil points into, now cheaper, tech. And with Ottomans, you probably don´t get crush. With Americas for example, that could be harsh.