You don't have any idea what your own or anyone elses ability to achieve it is.
I know we can go to the moon, and drive remote controllable vehicles around on Mars, so I know that human beings have the ability to pull off some damn difficult things, and that's all I need to know. That there are possibilities where others see brick walls. If no one thought anything hard was possible, we'd still be stuck in the stone age. Can I do it? Don't know, haven't tried.
If you read and understood the link I posted then saying it's possible to do it and being fairly confident you could do it yourself is a bad sign for your ability to actually do it.
With fairly confident I meant that I'm fairly confident in my programming ability, and I specifically said that I don't know if I could handle a large, complex project in assembly language by myself. Also, notice the word 'fairly', implying I know that I have
some skill. How much? I don't know.
Anyway, all you're trying to say is how things are impossible, and I refuse to think like that, because I know things are not impossible, even though they may be very difficult.