Idea that won’t let me sleep

The idea was born 5 years ago. And now I think I have knowledge to realize it but I don't have funds. As regular student I can't work or work very little and can't earn that kind off money. Idea is business model one off kind in my country, I haven't seen people doing it. I would like to sell things online as third party, basicly connecting people by demand/supply law with my marketing skills where both sides would be happy. I need money for opening entity and for marketing and then with my earnings I would put 50% back in business, with 40% I would do my second job which I desire the most and that's stocks, I love numbers and forex, I have been there for 5 years, that's something which makes me happy and 10% would keep for my self and possibly donate for ideas like this. Thank you for your help.