I've had a look at the Antonov's cockpit many times, and, although I do admire the plane for it's engineering (still can't get over it's size), and I think it would be a fun adventure to model it, there are a few variables that make it a nightmare. The number of gauges in the cockpit, and the Cyrillic lettering being just 2 major hurdles. I suppose the lettering could be translated to English, but then the authenticity would be gone. It's an extremely large scale project, if I were to do it to the level I wanted to do it. So for that reason, and a few others, I would only do it as a contract job.
I could be reasonable in a quote as a contract job, but if you want details, it would be more appropriate to discuss that through the proper channels. To give you an idea, what would an average professional make at their job in 4 months? That amount would be somewhere around the amount that would make this happen.