I can appreciate your ultimate goal, but I wouldnt put it in a specific plan. I am a PPL holder, who is just finishing a degree and off to states to complete the rest of my training. i would kill for the right seat of any commercial aircraft upon completion and you can bet Ill work hard for it. The most qualified pilot in the world can only dream of a seat in a jumbo or 380 or even these days in transatlantic, but the first task is a RHS in any commercial aircraft. If you can do the calculation of 74 size aircraft against smaller, then add the factor of your age, you can do a rough calculation on your chances...
I am 26 and doubt my chances of getting a 747 seat and I live and breath flying.
Just MHO, and I always say GO FOR IT, I dont make the rules and I hope you acheive your goal.