I was once in this situation whereby I had to learn a skill,then by doing that I started using my knowledge to make money...

So Firstly, I would say u should learn a skill if there is no affordable one u can pay for then try learning online...at least learning n being perfect in it would bring u profits depending on how u apply it..

Secondly, u can try doing some minor jobs like a Sales rep or a teaching job then with time u gather up ur income for the business u have in mind...
I want u to be aware that building up or saving for money for something is not as easy as it sounds o,u would be tempted to use the money for some personal stuffs mostly in terms of WANTS...

Buh with time if u determine n plan well for it u would achieve ur aim..

U can call me for more questions n Advice