how long do you think it will take you to get to version 3.0
I can't give you a specific date, but it should take a month, maybe shorter or longer. It's hard to tell: there's also a huge list of things to implement for 3.0, and some may take longer or shorter than expected. Many are already implemented (power system, new liquids, etc) but there's still so much to do, and that's not even counting bugfixing time.