Heavy Ikea Sofa to be relocated a few streets away

I need a minimum of 2-3 people to help transport my sofa from my apartment to a house which is two streets away from my home. The Challenge: The sofa is on the fifth floor of my apartment building and cannot be taken down in the lift. You need to unscrew the leg frame from the sofa then carry it down the stairs and then take it to its new house, screw the legs back on and place it in the ground floor living room. The sofa is heavy and getting it out of my apartment building without damaging the walls and the leather sofa is challenging and so you need to move it with another 1 or 2 people. you will also need something to transport sofa to new location - huge trolley? Van?