So here is the deal... .info many good keywords domains available and .com not the case. If i create 30 mini .info keyword sites is that better than creating 1 big site? explain your reasoning
Creating a site in .com is much better, as it has a good reach. But if you are planning to work extensively on .info domain, like updating the content regularly, doing good off page activities. You can also create .info sites and inter link them that will give them good weightage.
30x .info is going to require 30x as much work to get them all set up with good quality content and ranked high.
onlinetrading, one good .com website is much better than 30 bad info-websites. I always recommend to make websites for people, not for Google.