WTH: alignment at home

there is no possible way to do a proper alignment this way all the suspension components have to have a load on them to align it with out a machine and second of all string? how accurate do you think this will work…this is a horrible idea! why isnt it drivable? if you just need to set toe jack it up and adjust it your self and then drive it! not worth spending money for someone to set toe then to have another person align it for 70 bucks