Is there any escape to bad credit? i have3 times the caltoral for the loan!!!!?

i am trying to borrow $45,000 to open a doughnut shop and my fico is 500 i have $15,000 in shop equipment i have already purchased, the funds will be used to purchase and rehab a building that will upon completion be worth $90,000 and i have $79000 in equity in my home that i cant borrow because my fico score will only allow 70% ltvand my math says $184,000 of equity should suffice for a $45,000 loan. my credit issues are mostly old (10 years in a lot of cases)debt thats been sold from vendor to vendor and shows up 3 to 4 different vendors with different number making it seem like its different accounts and you can go in and clean it up but next month they just relist them who will police these people ? does anyone have any suggestions?