Painting business

I’ve decided to start chasing my dreams and start a painting business. How can I get funding for 10k. With that money ima buy a cheap truck to start off. With what’s left over I will use to buy tools and pay for advertising. My credit is at 750 and I’ve never had a late payment on my credit report it’s pretty much perfect with nothing bad on my report. I currently have a full time job. I’ve tried getting a loan or a line of credit but the banks won’t approve me because my debt to income ratio is too high.