Firstly
As the other reply mentions, you should definately get a PPL before you think any further about flying professionally.
If you get through the PPL stage and the first class medical and still enjoy the idea of flying for cash then your next concern should be to verify the potential flying schools you'd like to do your flying with.
I don't think you'll ever manage to scrounge the entire amount for your whole journy to the commercial license as well as the instrument rating. Working in a factory is not something i would consider.
Here's what you could do once you manage to get the money:
find a school that offers a job as an instructor when you finish the ATPL, IR, CPL, multi, MCC course, CFI (Instructor license). This will help you get the much needed hours you need to accumulate to get to the air lines.
You can of course just go for the ATPL, IR, CPL, MULTI, MCC course and try to get a job from there. You can actually get a job if you know someone who's actually got a good position with the air line. (So far there's only one instructor I know that claims that everyone of his students managed to land a job with total time of less than 300 hours,)
Other fact need to mention is you need a degree or diploma in order for any air line to even look at your CV. I don't know an air line that would let you work without one or something similiar to it.