>>5
sorry but that's entirely impossible. You can not mastered 2000 kanji in just 2 years. And even if you could, there's no way to memorize about 10.000 compounds in just 2 years. Also Japanese Grammar is pretty tough as well in my opinion, especially because it gradually gets harder the further you progress.
>>1
If you spend 1-2 hours each day, I'd say you will need about 5 years to be able to comfortably play visual novel with the help of an electronic dictionary. Learning to read/write the language on your own is definitely possible, so go for it.