Buy Coffeeshop

I am the only bread winner in our household...my mom's eyes is very weak, she cannot see, my dad must look after her and my two kids, so I am the only one working and with my salary I cannot afford everything, sometimes we do not have electricity, food. I feel always I am letting my family down, have a lot of stress, every one is suffering, I ask for a raise, but my boss says no, tried to find another job, but to tired and my dad needs help with things. That's why I need help to start my own business, I want to buy a coffeeshop, someone can fund, I can pay back, monthly...I just really need this opportunity to better myself and my family life. Please help me?